Crossgen outerloop: 'This project has an assembly name identical to another project'

[jtschuster]

In this build: https://dev.azure.com/dnceng-public/public/_build/results?buildId=1353247&view=logs&j=3725811e-4a8b-5f6a-b03b-a353ee894148&t=d59fccfb-2b13-5841-75bf-bfec705ee16a
https://dev.azure.com/dnceng-public/public/_build/results?buildId=1351593&view=logs&j=3725811e-4a8b-5f6a-b03b-a353ee894148&t=d59fccfb-2b13-5841-75bf-bfec705ee16a

/__w/1/s/src/tests/Common/mergedrunner.targets(18,5): error : This project has an assembly name identical to another project, if this CoreCLRTestLibrary, you should reference $(TestLibraryProjectPath) instead of constructing the path yourself: /__w/1/s/src/tests/baseservices/exceptions/regressions/V1/SEH/COOL/finally.csproj [/__w/1/s/src/tests/baseservices/exceptions/baseservices-exceptions.csproj] [/__w/1/s/src/tests/build.proj]
/__w/1/s/src/tests/Common/mergedrunner.targets(18,5): error : This project has an assembly name identical to another project, if this CoreCLRTestLibrary, you should reference $(TestLibraryProjectPath) instead of constructing the path yourself: /__w/1/s/src/tests/GC/API/GCHandle/Target.csproj [/__w/1/s/src/tests/GC/GC.csproj] [/__w/1/s/src/tests/build.proj]

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