Serve .eot and .ttf through Celerity

Summary:
D9153 fixed half of this, but exposed another issue, which is that we don't actually serve ".eot" and ".ttf" through Celerity right now.

Make sure we include them in the routes.

Test Plan:

• Downloaded CSS, JS, TTF, EOT, WOFF, JPG, etc., through Celerity.

Reviewers: btrahan, chad

Reviewed By: chad

Subscribers: epriestley

Differential Revision: https://secure.phabricator.com/D9154