R1:5dc4e76eb9f8

Fix the direction of the commit/revision edge

Summary: Ref T13276. This edge is pointed the wrong way. Point it the right way.

Test Plan: Will verify production works better.

Reviewers: amckinley

Reviewed By: amckinley

Maniphest Tasks: T13276

Differential Revision: https://secure.phabricator.com/D20490