Outer build swallowing errors

[mmitche]

The Aspnetcore build is erroring out, but the errors are getting swallowed somewhere in between the outer build and orchestrator, or maybe the scripting.

[mmitche]

https://dev.azure.com/dnceng/internal/_build/results?buildId=2416468&view=artifacts&pathAsName=false&type=publishedArtifacts