sdk: dotnet build with runtime specified does not create the right output

Moved from https://github.com/dotnet/cli/issues/5039 on behalf of @Fabi, @nguerrera

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Steps to reproduce

1. Install Visual Studio 2017 RC
2. Follow the “Deploying a simple self-contained deployment” part from https://docs.microsoft.com/en-us/dotnet/articles/core/preview3/deploying/ until step 5

Expected behavior

After running the dotnet build -r win10-x64 command a folder with the build files (including an .exe file not only dll) should be created at “.\bin\Debug\netcoreapp1.0<runtime_identifier>”

Actual behavior

There is no runtime folder with executables generated. That only works with the publish command now. Before on json based project files it worked fine.

Environment data

dotnet --info output:

.NET Command Line Tools (1.0.0-preview4-004233)

Product Information:
 Version:            1.0.0-preview4-004233
 Commit SHA-1 hash:  8cec61c6f7

Runtime Environment:
 OS Name:     Windows
 OS Version:  10.0.14393
 OS Platform: Windows
 RID:         win10-x64
 Base Path:   C:\Program Files\dotnet\sdk\1.0.0-preview4-004233

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@nguerrera this is the standalone publish scenario. It should work like this:

on build

Build produces the portable output as well as a RID-specific output. The RID-specific output contains the portable output + the appropriate RID-specific host for the app. That host still uses deps.json, etc. to load Shared Framework artifacts from the nuget cache

on publish

The publish output is RID specific. It includes everything from the RID-specific build output + everything from the RID-specific Shared Framework. The publish output can now be zip’d and then deployed to any host with a matching RID.