Don't show "View Wiki" reminder link if viewer has no access to Phriction
Summary: Fixes T6581.
Test Plan:
- Loaded project page with Phriction accessible, saw link.
- Loaded project page with Phriction uninstalled, no link.
Reviewers: btrahan, chad
Reviewed By: chad
Subscribers: epriestley
Maniphest Tasks: T6581
Differential Revision: https://secure.phabricator.com/D10868