Makefile: Use PLUGIN_OBJECT_FILES var to simplify rule

Author: vries

Makefile

@@ -155,7 +155,7 @@ $(PLUGIN_OBJECT_GENERATED_FILES): CPPFLAGS+= $(if $(srcdir),-I$(srcdir))
 
 # This is the standard .c->.o recipe, but it needs to be stated
 # explicitly to support the case that $(srcdir) is not blank.
-$(PLUGIN_OBJECT_SOURCE_FILES) $(PLUGIN_OBJECT_GENERATED_FILES): %.o: $(srcdir)%.c autogenerated-config.h $(srcdir)gcc-python.h $(LIBGCC_C_API_SO) autogenerated-EXTRA_CFLAGS.txt
+$(PLUGIN_OBJECT_FILES): %.o: $(srcdir)%.c autogenerated-config.h $(srcdir)gcc-python.h $(LIBGCC_C_API_SO) autogenerated-EXTRA_CFLAGS.txt
 	$(COMPILE.c) $(shell cat autogenerated-EXTRA_CFLAGS.txt) $(OUTPUT_OPTION) $<
 
 print-gcc-version: print-gcc-version.c autogenerated-EXTRA_CFLAGS.txt