R1:348ca4207c1c

Use "added a dependency" over "added a revision"

Test Plan: Added a dependency, saw a descriptive description.

Reviewers: epriestley, #blessed_reviewers

Reviewed By: epriestley, #blessed_reviewers

Subscribers: epriestley, Korvin

Differential Revision: https://secure.phabricator.com/D9111