Include the missing TraceKit from the output_pjs_deps build.

Summary: The dependencies were moved around and we need to include Tracekit as part of it now.

Test Plan: Verify that `Program.assertEqual(2, 4);` works correctly now.

Reviewers: pamela

Reviewed By: pamela

Differential Revision: http://phabricator.khanacademy.org/D13026