sdk: Runtime-specific build fails for projects with P2P references

[ Moved from dotnet/cli#4992 ]

Steps to reproduce

test_app.zip in test_app\App:

• dotnet restore
• dotnet build -r win10-x64

Expected behavior

build succeeds

Actual behavior

build fails with output:

C:\Users\svbomer\AppData\Local\Temp\.NETStandard,Version=v1.4.AssemblyAttributes.cs(4,20): error CS0400: The type or namespace name 'System' could not be found in the global namespace (are you missing an assembly reference?) [C:\Users\svbomer\active\projects\managed_linker\test_app\Library\Library.csproj]
obj\Debug\netstandard1.4\Library.AssemblyInfo.cs(6,12): error CS0246: The type or namespace name 'System' could not be found (are you missing a using directive or an assembly reference?) [C:\Users\svbomer\active\projects\managed_linker\test_app\Library\Library.csproj]
obj\Debug\netstandard1.4\Library.AssemblyInfo.cs(7,12): error CS0246: The type or namespace name 'System' could not be found (are you missing a using directive or an assembly reference?) [C:\Users\svbomer\active\projects\managed_linker\test_app\Library\Library.csproj]
obj\Debug\netstandard1.4\Library.AssemblyInfo.cs(8,12): error CS0246: The type or namespace name 'System' could not be found (are you missing a using directive or an assembly reference?) [C:\Users\svbomer\active\projects\managed_linker\test_app\Library\Library.csproj]
obj\Debug\netstandard1.4\Library.AssemblyInfo.cs(9,12): error CS0246: The type or namespace name 'System' could not be found (are you missing a using directive or an assembly reference?) [C:\Users\svbomer\active\projects\managed_linker\test_app\Library\Library.csproj]
obj\Debug\netstandard1.4\Library.AssemblyInfo.cs(10,12): error CS0246: The type or namespace name 'System' could not be found (are you missing a using directive or an assembly reference?) [C:\Users\svbomer\active\projects\managed_linker\test_app\Library\Library.csproj]
obj\Debug\netstandard1.4\Library.AssemblyInfo.cs(11,12): error CS0246: The type or namespace name 'System' could not be found (are you missing a using directive or an assembly reference?) [C:\Users\svbomer\active\projects\managed_linker\test_app\Library\Library.csproj]
obj\Debug\netstandard1.4\Library.AssemblyInfo.cs(12,12): error CS0246: The type or namespace name 'System' could not be found (are you missing a using directive or an assembly reference?) [C:\Users\svbomer\active\projects\managed_linker\test_app\Library\Library.csproj]
obj\Debug\netstandard1.4\Library.AssemblyInfo.cs(13,12): error CS0246: The type or namespace name 'System' could not be found (are you missing a using directive or an assembly reference?) [C:\Users\svbomer\active\projects\managed_linker\test_app\Library\Library.csproj]
obj\Debug\netstandard1.4\Library.AssemblyInfo.cs(14,12): error CS0246: The type or namespace name 'System' could not be found (are you missing a using directive or an assembly reference?) [C:\Users\svbomer\active\projects\managed_linker\test_app\Library\Library.csproj]
C:\Users\svbomer\AppData\Local\Temp\.NETStandard,Version=v1.4.AssemblyAttributes.cs(4,71): error CS0518: Predefined type 'System.String' is not defined or imported [C:\Users\svbomer\active\projects\managed_linker\test_app\Library\Library.csproj]
C:\Users\svbomer\AppData\Local\Temp\.NETStandard,Version=v1.4.AssemblyAttributes.cs(4,100): error CS0246: The type or namespace name 'FrameworkDisplayName' could not be found (are you missing a using directive or an assembly reference?) [C:\Users\svbomer\active\projects\managed_linker\test_app\Library\Library.csproj]
C:\Users\svbomer\AppData\Local\Temp\.NETStandard,Version=v1.4.AssemblyAttributes.cs(4,123): error CS0518: Predefined type 'System.String' is not defined or imported [C:\Users\svbomer\active\projects\managed_linker\test_app\Library\Library.csproj]
obj\Debug\netstandard1.4\Library.AssemblyInfo.cs(6,55): error CS0518: Predefined type 'System.String' is not defined or imported [C:\Users\svbomer\active\projects\managed_linker\test_app\Library\Library.csproj]
obj\Debug\netstandard1.4\Library.AssemblyInfo.cs(7,61): error CS0518: Predefined type 'System.String' is not defined or imported [C:\Users\svbomer\active\projects\managed_linker\test_app\Library\Library.csproj]
obj\Debug\netstandard1.4\Library.AssemblyInfo.cs(8,59): error CS0518: Predefined type 'System.String' is not defined or imported [C:\Users\svbomer\active\projects\managed_linker\test_app\Library\Library.csproj]
obj\Debug\netstandard1.4\Library.AssemblyInfo.cs(9,59): error CS0518: Predefined type 'System.String' is not defined or imported [C:\Users\svbomer\active\projects\managed_linker\test_app\Library\Library.csproj]
obj\Debug\netstandard1.4\Library.AssemblyInfo.cs(10,68): error CS0518: Predefined type 'System.String' is not defined or imported [C:\Users\svbomer\active\projects\managed_linker\test_app\Library\Library.csproj]
obj\Debug\netstandard1.4\Library.AssemblyInfo.cs(11,55): error CS0518: Predefined type 'System.String' is not defined or imported [C:\Users\svbomer\active\projects\managed_linker\test_app\Library\Library.csproj]
obj\Debug\netstandard1.4\Library.AssemblyInfo.cs(12,53): error CS0518: Predefined type 'System.String' is not defined or imported [C:\Users\svbomer\active\projects\managed_linker\test_app\Library\Library.csproj]
obj\Debug\netstandard1.4\Library.AssemblyInfo.cs(13,55): error CS0518: Predefined type 'System.String' is not defined or imported [C:\Users\svbomer\active\projects\managed_linker\test_app\Library\Library.csproj]
obj\Debug\netstandard1.4\Library.AssemblyInfo.cs(14,63): error CS0518: Predefined type 'System.String' is not defined or imported [C:\Users\svbomer\active\projects\managed_linker\test_app\Library\Library.csproj]
Library.cs(1,7): error CS0246: The type or namespace name 'System' could not be found (are you missing a using directive or an assembly reference?) [C:\Users\svbomer\active\projects\managed_linker\test_app\Library\Library.csproj]
C:\Users\svbomer\AppData\Local\Temp\.NETStandard,Version=v1.4.AssemblyAttributes.cs(2,7): error CS0246: The type or namespace name 'System' could not be found (are you missing a using directive or an assembly reference?) [C:\Users\svbomer\active\projects\managed_linker\test_app\Library\Library.csproj]
C:\Users\svbomer\AppData\Local\Temp\.NETStandard,Version=v1.4.AssemblyAttributes.cs(3,7): error CS0246: The type or namespace name 'System' could not be found (are you missing a using directive or an assembly reference?) [C:\Users\svbomer\active\projects\managed_linker\test_app\Library\Library.csproj]
obj\Debug\netstandard1.4\Library.AssemblyInfo.cs(3,7): error CS0246: The type or namespace name 'System' could not be found (are you missing a using directive or an assembly reference?) [C:\Users\svbomer\active\projects\managed_linker\test_app\Library\Library.csproj]
obj\Debug\netstandard1.4\Library.AssemblyInfo.cs(4,7): error CS0246: The type or namespace name 'System' could not be found (are you missing a using directive or an assembly reference?) [C:\Users\svbomer\active\projects\managed_linker\test_app\Library\Library.csproj]
Library.cs(30,7): error CS0518: Predefined type 'System.Object' is not defined or imported [C:\Users\svbomer\active\projects\managed_linker\test_app\Library\Library.csproj]
Library.cs(3,14): error CS0518: Predefined type 'System.Object' is not defined or imported [C:\Users\svbomer\active\projects\managed_linker\test_app\Library\Library.csproj]
Library.cs(19,12): error CS0518: Predefined type 'System.Int32' is not defined or imported [C:\Users\svbomer\active\projects\managed_linker\test_app\Library\Library.csproj]
Library.cs(24,24): error CS0518: Predefined type 'System.Int32' is not defined or imported [C:\Users\svbomer\active\projects\managed_linker\test_app\Library\Library.csproj]
Library.cs(24,12): error CS0518: Predefined type 'System.Void' is not defined or imported [C:\Users\svbomer\active\projects\managed_linker\test_app\Library\Library.csproj]Library.cs(5,13): error CS0518: Predefined type 'System.Int32' is not defined or imported [C:\Users\svbomer\active\projects\managed_linker\test_app\Library\Library.csproj]Library.cs(6,13): error CS0518: Predefined type 'System.Int32' is not defined or imported [C:\Users\svbomer\active\projects\managed_linker\test_app\Library\Library.csproj]Library.cs(8,5): error CS0518: Predefined type 'System.Void' is not defined or imported [C:\Users\svbomer\active\projects\managed_linker\test_app\Library\Library.csproj]
Library.cs(14,20): error CS0518: Predefined type 'System.Int32' is not defined or imported [C:\Users\svbomer\active\projects\managed_linker\test_app\Library\Library.csproj]
Library.cs(14,5): error CS0518: Predefined type 'System.Void' is not defined or imported [C:\Users\svbomer\active\projects\managed_linker\test_app\Library\Library.csproj] D:\cli\artifacts\win10-x64\stage2\sdk\1.0.0-preview5-004233\Sdks\Microsoft.NET.Sdk\build\Microsoft.NET.Sdk.targets(82,5): error : Assets file 'C:\Users\svbomer\active\projects\managed_linker\test_app\Library\obj\project.assets.json' doesn't have a target for '.NETStandard,Version=v1.4/win10-x64'. Ensure you have restored this project for TargetFramework='netstandard1.4' and RuntimeIdentifier='win10-x64'. [C:\Users\svbomer\active\projects\managed_linker\test_app\Library\Library.csproj]
D:\cli\artifacts\win10-x64\stage2\sdk\1.0.0-preview5-004233\Sdks\Microsoft.NET.Sdk\build\Microsoft.NET.Sdk.targets(82,5): error : Cannot find project info for 'C:\Users\svbomer\active\projects\managed_linker\test_app\Library\Library.csproj'. This can indicate a missing project reference. [C:\Users\svbomer\active\projects\managed_linker\test_app\App\test_app.csproj]

Environment data

dotnet --info output:

.NET Command Line Tools (1.0.0-preview5-004233)

Product Information:
 Version:            1.0.0-preview5-004233
 Commit SHA-1 hash:  1fd99f1588

Runtime Environment:
 OS Name:     Windows
 OS Version:  10.0.14393
 OS Platform: Windows
 RID:         win10-x64
 Base Path:   D:\cli\artifacts\win10-x64\stage2\sdk\1.0.0-preview5-004233