Add git-pack-intersect to .gitignore

Signed-off-by: Lukas Sandström <lukass@etek.chalmers.se>
Signed-off-by: Junio C Hamano <junkio@cox.net>

.gitignore

@@ -60,6 +60,7 @@ git-mktag
 git-name-rev
 git-mv
 git-octopus
+git-pack-intersect
 git-pack-objects
 git-parse-remote
 git-patch-id