kbuild, x86: use a short log for arch/x86/lib/libgcc.a

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Cc: Simon Glass <sjg@chromium.org>

arch/x86/lib/Makefile

@@ -23,5 +23,6 @@ obj-$(CONFIG_CMD_ZBOOT)	+= zimage.o
 LIBGCC := $(notdir $(NORMAL_LIBGCC))
 extra-y := $(LIBGCC)
 
-$(obj)/$(LIBGCC): $(NORMAL_LIBGCC)
-	$(OBJCOPY) $< $@ --prefix-symbols=__normal_
+OBJCOPYFLAGS := --prefix-symbols=__normal_
+$(obj)/$(LIBGCC): $(NORMAL_LIBGCC) FORCE
+	$(call if_changed,objcopy)