MAINTAINERS: Update kbuild git URLs

The kbuild tree was moved to git.kernel.org so that people can find it
more easily.
Signed-off-by: Michal Marek <mmarek@suse.cz>

MAINTAINERS

@@ -3098,8 +3098,8 @@ F:	fs/autofs4/
 
 KERNEL BUILD + files below scripts/ (unless maintained elsewhere)
 M:	Michal Marek <mmarek@suse.cz>
-T:	git git://repo.or.cz/linux-kbuild.git for-next
-T:	git git://repo.or.cz/linux-kbuild.git for-linus
+T:	git git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild-2.6.git for-next
+T:	git git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild-2.6.git rc-fixes
 L:	linux-kbuild@vger.kernel.org
 S:	Maintained
 F:	Documentation/kbuild/