Summary: Ref T1049. Creates convenience actions at the Buildable level to stop, resume, or restart all builds.
Test Plan:
- Stopped all builds.
- Resumed all builds.
- Restarted all builds.
Reviewers: btrahan
Reviewed By: btrahan
CC: aran
Maniphest Tasks: T1049
Differential Revision: https://secure.phabricator.com/D7899
