merge-recursive: Only print relevant rename messages

merge-recursive: Only print relevant rename messages

It isn't really interesting to know about the renames that have
already been committed to the branch you are working on. Furthermore,
the 'git-apply --stat' at the end of git-(merge|pull) will tell us
about any renames in the other branch.

With this commit only renames which require a file-level merge will
be printed.

Signed-off-by: Fredrik Kuivinen <freku045@student.liu.se>
Signed-off-by: Junio C Hamano <junkio@cox.net>