build: propagate $DIFF to scripts
authorJunio C Hamano <gitster@pobox.com>
Sat, 5 Jun 2010 16:36:13 +0000 (09:36 -0700)
committerJunio C Hamano <gitster@pobox.com>
Sat, 5 Jun 2010 16:36:13 +0000 (09:36 -0700)
git-merge-one-file expects to run "-u" capable "diff", but using
$DIFF is not the right way to do so.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
No differences found