R1:bc56a01948d1

Support data-symbol-name in symbol linking

Summary: See D3226.

Test Plan: Browse Diffusion. Click on things.

Reviewers: epriestley

Reviewed By: epriestley

CC: nh, aran, Korvin

Maniphest Tasks: T1602

Differential Revision: https://secure.phabricator.com/D3227