Update test/SCCS/diskcheck.py for recent GetBuildFailures() robustness change, which changed the exit message in this case.
Update test/SCCS/diskcheck.py for recent GetBuildFailures()
robustness change, which changed the exit message in this case.

Distrotech/scons,Distrotech/scons,Distrotech/scons,Distrotech/scons,Distrotech/scons