fastlane: Scan hangs on touching .xctests

New Issue Checklist

• Updated fastlane to the latest version
• I have read the Contribution Guidelines

Issue Description

Sometimes my bamboo CI hangs when executing scan on touching the .xctests files. Don’t know what the real problem is here 😦

Complete output when running fastlane, including the stack trace and command used

08-Aug-2016 15:13:43    [15:13:43]: ▸ Compiling PriceTests.swift
08-Aug-2016 15:13:43    [15:13:43]: ▸ Linking MyProject_Tests
08-Aug-2016 15:13:43    [15:13:43]: ▸ ⚠️  ld: directory not found for option '-F/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator9.3.sdk/Developer/Library/Frameworks'
08-Aug-2016 15:13:43    [15:13:43]: ▸ Generating 'MyProject_tests.xctest.dSYM'
08-Aug-2016 15:13:43    [15:13:43]: ▸ Running script '[CP] Embed Pods Frameworks'
08-Aug-2016 15:13:45    [15:13:45]: ▸ Running script '[CP] Copy Pods Resources'
08-Aug-2016 15:13:45    [15:13:45]: Running Tests: ▸ Touching MyProject_tests.xctest

Configuration Files

Please copy the complete content of your Fastfile and any other configuration files you use below:

Fastfile:

scan \
    --workspace PATH_TO_WORKSPACE \
    --scheme MyProject-Tests \
    --xcargs "-derivedDataPath ../build" \
    --buildlog_path ../logs/scan \
    --output_directory ../test-reports \
    --device "iPhone 6s 9.3" \
    --sdk iphonesimulator \
    --code_coverage \
    -r

Environment

fastlane version (run fastlane -v): scan 0.10.1

Do you use bundler to execute fastlane (i.e. bundle exec fastlane)? nope

Do you use a Ruby environment manager (e.g. chruby, rbenv, rvm)? nope