8138692: libjsig compilation is missing EXTRA_CFLAGS on macosx

Reviewed-by: ihse, mikael

make/bsd/makefiles/jsig.make

@@ -62,7 +62,7 @@ endif
 $(LIBJSIG): $(JSIGSRCDIR)/jsig.c $(LIBJSIG_MAPFILE)
 	@echo Making signal interposition lib...
 	$(QUIETLY) $(CC) $(SYMFLAG) $(ARCHFLAG) $(SHARED_FLAG) $(PICFLAG) \
-                         $(LFLAGS_JSIG) $(JSIG_DEBUG_CFLAGS) -o $@ $<
+                         $(LFLAGS_JSIG) $(JSIG_DEBUG_CFLAGS) $(EXTRA_CFLAGS) -o $@ $<
 ifeq ($(ENABLE_FULL_DEBUG_SYMBOLS),1)
   ifeq ($(OS_VENDOR), Darwin)
 	$(DSYMUTIL) $@