Add more generated files to .gitignore

git-name-rev, git-mv and git-shell are recent additions to git.

Signed-off-by: Johannes Schindelin <Johannes.Schindelin@gmx.de>
Signed-off-by: Junio C Hamano <junkio@cox.net>

.gitignore

@@ -54,6 +54,8 @@ git-merge-recursive
 git-merge-resolve
 git-merge-stupid
 git-mktag
+git-name-rev
+git-mv
 git-octopus
 git-pack-objects
 git-parse-remote
@@ -78,6 +80,7 @@ git-revert
 git-send-email
 git-send-pack
 git-sh-setup
+git-shell
 git-shortlog
 git-show-branch
 git-show-index