When testing tags I ran into an interesting problem.
git-tag-script dies if .git/refs/tags/ does not exist.
And that directory didn't get created when I build my repository,
so we need to create it if it doesn't exist.
Signed-of-by: Eric W. Biederman <ebiederm@xmission.com> Signed-off-by: Linus Torvalds <torvalds@osdl.org>