Remove PLATFORM_SHARED_CFLAGS when compiling .o files

Summary:

The flags is accidentally introduced, and resulted in problems in 3rd party release.

Test Plan:

run make in all platforms (when doing the 3rd party release)

Makefile

@@ -322,10 +322,10 @@ IOSVERSION=$(shell defaults read $(PLATFORMSROOT)/iPhoneOS.platform/versionCFBun
 
 else
 .cc.o:
-	$(CXX) $(CXXFLAGS) $(PLATFORM_SHARED_CFLAGS) -c $< -o $@ $(COVERAGEFLAGS)
+	$(CXX) $(CXXFLAGS) -c $< -o $@ $(COVERAGEFLAGS)
 
 .c.o:
-	$(CC) $(CFLAGS) $(PLATFORM_SHARED_CFLAGS) -c $< -o $@
+	$(CC) $(CFLAGS) -c $< -o $@
 endif
 
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