build: adjust arch/x86/note.o rule

Avoid different spelling for the location of "xen-syms", and simply
use the dependency variable. This avoid the assumption about $(TARGET)
value.

Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
Acked-by: Jan Beulich <jbeulich@suse.com>

xen/arch/x86/Makefile

@@ -197,7 +197,7 @@ $(TARGET)-syms: prelink.o xen.lds
 	rm -f $(@D)/.$(@F).[0-9]* $(@D)/..$(@F).[0-9]*
 
 note.o: $(TARGET)-syms
-	$(OBJCOPY) -O binary --only-section=.note.gnu.build-id  $(BASEDIR)/xen-syms $@.bin
+	$(OBJCOPY) -O binary --only-section=.note.gnu.build-id $< $@.bin
 	$(OBJCOPY) -I binary -O elf64-x86-64 -B i386:x86-64 \
 		--rename-section=.data=.note.gnu.build-id -S $@.bin $@
 	rm -f $@.bin