MAINTAINERS: Add scripts/clang-tools to Kbuild section

Masahiro has always applied scripts/clang-tools patches but it is not
included in the Kbuild section, so neither he nor linux-kbuild get cc'd
on patches that touch those files.
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Acked-by: Nicolas Schier <nicolas@fjasle.eu>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>

MAINTAINERS

@@ -11528,6 +11528,7 @@ F:	scripts/*vmlinux*
 F:	scripts/Kbuild*
 F:	scripts/Makefile*
 F:	scripts/basic/
+F:	scripts/clang-tools/
 F:	scripts/dummy-tools/
 F:	scripts/mk*
 F:	scripts/mod/