add missing revision display for macOS release

macos/Pal.xcodeproj/project.pbxproj

@@ -1159,6 +1159,7 @@
 				);
 				GCC_GENERATE_DEBUGGING_SYMBOLS = NO;
 				GCC_MODEL_TUNING = G5;
+				GCC_PREPROCESSOR_DEFINITIONS = PAL_HAS_GIT_REVISION;
 				HEADER_SEARCH_PATHS = (
 					../3rd/SDL/include,
 					../liboggvorbis/include,