cmake: Un-ignore subdirectory *_defines.h as these are no longer generated.
cmake: Un-ignore subdirectory *_defines.h as these are no longer generated.

StanfordLegion/legion,StanfordLegion/legion,StanfordLegion/legion,StanfordLegion/legion,StanfordLegion/legion,StanfordLegion/legion,StanfordLegion/legion,StanfordLegion/legion