Summary: After you run `arc diff`, just run `build_tools/trigger_jenkins_test.sh` and Jenkins will test your diff!
Test Plan: Triggered a build to jenkins
Reviewers: sdong, rven, IslamAbdelRahman, anthony, yhchiang, meyering
Reviewed By: meyering
Subscribers: meyering, dhruba, leveldb
Differential Revision: https://reviews.facebook.net/D36021
