kbuild: fix make V=1

When make -s support were added to filechk to
combination created with make V=1 were not
covered.
Fix it by explicitly cover this case too.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Cc: Mike Frysinger <vapier@gentoo.org>

init/Makefile

@@ -27,6 +27,7 @@ $(obj)/version.o: include/linux/compile.h
 # mkcompile_h will make sure to only update the
 # actual file if its content has changed.
 
+       chk_compile.h = :
  quiet_chk_compile.h = echo '  CHK     $@'
 silent_chk_compile.h = :
 include/linux/compile.h: FORCE