Reverse the order of -b and --track in the man page.

Using "-b --track newbranch oldbranch" gives the error:

git checkout: updating paths is incompatible with switching
branches/forcing

However, "--track -b ..." works just fine.

Signed-off-by: Brian Gernhardt <benji@silverinsanity.com>
Signed-off-by: Junio C Hamano <junkio@cox.net>