Add error handling logic that if a source override path in DSC file does not exist, the build should break letting the developer know that the SOURCE_OVERRIDE_PATH does not exist.
Add error handling logic that if a source override path in DSC file does not exist, the build should break letting the developer know that the SOURCE_OVERRIDE_PATH does not exist.


git-svn-id: f3880c1fc5096ce2109c8aec392d8e07f619f417@1644 c2973edb-eda0-4c78-bc6a-9341b269661f

tianocore/buildtools-BaseTools,bitcrystal/buildtools-BaseTools,tianocore/buildtools-BaseTools,tianocore/buildtools-BaseTools,bitcrystal/buildtools-BaseTools,bitcrystal/buildtools-BaseTools,tianocore/buildtools-BaseTools,tianocore/buildtools-BaseTools,bitcrystal/buildtools-BaseTools,bitcrystal/buildtools-BaseTools