avutil: add objc.h to SKIPHEADERS

Signed-off-by: Aman Karmani <[email protected]>

libavutil/Makefile

@@ -195,6 +195,7 @@ OBJS += $(COMPAT_OBJS:%=../compat/%)
 # Windows resource file
 SLIBOBJS-$(HAVE_GNU_WINDRES)            += avutilres.o
 
+SKIPHEADERS                            += objc.h
 SKIPHEADERS-$(HAVE_CUDA_H)             += hwcontext_cuda.h
 SKIPHEADERS-$(CONFIG_CUDA)             += hwcontext_cuda_internal.h     \
                                           cuda_check.h