tools build: Fix quiet cmd indentation

The tools quiet cmd output has mismatched indentation (and extra space
character between cmd name and target name) compared to the rest of
kbuild out:

  HOSTCC  scripts/insert-sys-cert
  LD       /srv/code/tools/objtool/arch/x86/objtool-in.o
  LD       /srv/code/tools/objtool/libsubcmd-in.o
  AR       /srv/code/tools/objtool/libsubcmd.a
  HOSTLD  scripts/genksyms/genksyms
  CC      scripts/mod/empty.o
  HOSTCC  scripts/mod/mk_elfconfig
  CC      scripts/mod/devicetable-offsets.s
  MKELF   scripts/mod/elfconfig.h
  HOSTCC  scripts/mod/modpost.o
  HOSTCC  scripts/mod/file2alias.o
  HOSTCC  scripts/mod/sumversion.o
  LD       /srv/code/tools/objtool/objtool-in.o
  LINK     /srv/code/tools/objtool/objtool
  HOSTLD  scripts/mod/modpost
  CC      kernel/bounds.s

Adjust to match the rest of kbuild.
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>

tools/scripts/Makefile.include

@@ -144,7 +144,7 @@ ifneq ($(silent),1)
 			 $(MAKE) $(PRINT_DIR) -C $$subdir
 	QUIET_FLEX     = @echo '  FLEX    '$@;
 	QUIET_BISON    = @echo '  BISON   '$@;
-	QUIET_GENSKEL  = @echo '  GEN-SKEL '$@;
+	QUIET_GENSKEL  = @echo '  GENSKEL '$@;
 
 	descend = \
 		+@echo	       '  DESCEND '$(1); \