[arm] Failed to build Managed tests build in arm_cross_release_ubuntu

[VincentBu]

Job:
https://ci.dot.net/job/dotnet_coreclr/job/master/view/arm/job/arm_cross_release_ubuntu/909/

Log:

/mnt/j/workspace/dotnet_coreclr/master/arm_cross_release_ubuntu/tests/dir.traversal.targets(25,5): error : (No message specified) [/mnt/j/workspace/dotnet_coreclr/master/arm_cross_release_ubuntu/tests/src/dirs.proj]
/mnt/j/workspace/dotnet_coreclr/master/arm_cross_release_ubuntu/tests/dir.traversal.targets(25,5): error : (No message specified) [/mnt/j/workspace/dotnet_coreclr/master/arm_cross_release_ubuntu/tests/build.proj]
    3 Warning(s)
    2 Error(s)

Time Elapsed 00:05:58.45
Command execution failed with exit code 1.

[RussKeldorph]

Looks like a spurious failure, like msbuild died maybe.

[jashook]

Not being hit atm.