git.el: Add a commit description to the reflog.
git.el: Add a commit description to the reflog.

Add a description of the commit to the reflog using the first line of
the log message, the same way the git-commit script does it.

Signed-off-by: Alexandre Julliard <a3c1c71ac0d85b781251f68481a696b8e4d0781d@winehq.org>
Signed-off-by: Junio C Hamano <dc50d1021234060e53ec42a77d526afa2fe07479@cox.net>

destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git