Update topo-order test.
Update topo-order test.

The recently we updated rev-list --topo-order to show the heads
in date order, but we had a test that expected to see the old
behaviour.

Signed-off-by: Junio C Hamano <dc50d1021234060e53ec42a77d526afa2fe07479@cox.net>

destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git