Update Font Awesome .woff path
Summary: We're having trouble with this pointing at the wrong file after D10778; I assume that making it match the others is the proper fix...
Test Plan: Crossed fingers.
Reviewers: epriestley, #blessed_reviewers, chad
Reviewed By: #blessed_reviewers, chad
Subscribers: Korvin, epriestley
Differential Revision: https://secure.phabricator.com/D10785