Tests: Fix RunCMake.TargetSources on Xcode 1.5

Xcode 1.5 does not support multiple configurations.  The generator also
adds some sources internally that cause extra OriginDebug output.
Update the expected output to tolerate it.
Merge topic 'xcode15-fix-RunCMake-TargetSources' into next

0366ba5d Tests: Fix RunCMake.TargetSources on Xcode 1.5