build: hide that we are updating xen/lib/x86

Change of directory to xen/lib/x86 isn't needed to be shown. If
something gets updated, make will print the command line.

Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
Reviewed-by: Luca Fancellu <luca.fancellu@arm.com>
Acked-by: Jan Beulich <jbeulich@suse.com>

xen/include/Makefile

@@ -229,7 +229,7 @@ ifeq ($(XEN_TARGET_ARCH),x86_64)
 .PHONY: lib-x86-all
 lib-x86-all:
 	@mkdir -p $(obj)/xen/lib/x86
-	$(MAKE) -C $(obj)/xen/lib/x86 -f $(abs_srctree)/$(src)/xen/lib/x86/Makefile all
+	$(Q)$(MAKE) -C $(obj)/xen/lib/x86 -f $(abs_srctree)/$(src)/xen/lib/x86/Makefile all
 
 all: lib-x86-all
 endif