R1:cd0386bf8b73

Remarkup unittest result messages

Summary: This diffs adds support for marking up unittest result messages.

Test Plan: Verified that links in unittest results were markup'd.

Reviewers: epriestley, jungejason

Reviewed By: epriestley

CC: aran, epriestley, zeeg

Differential Revision: https://secure.phabricator.com/D1298