Use celerity for document_black.png in PhabricatorStandardPageView
Summary:
The image was incorrectly served on /rsrc without using celerity. This
is no longer routable with recommendations in D9401.
Test Plan: Browse to home page and inspect javascript link for this resource.
Reviewers: epriestley, Blessed Reviewers
Reviewed By: epriestley, Blessed Reviewers
Subscribers: epriestley, Korvin
Differential Revision: https://secure.phabricator.com/D10040