R1:4aea31023de0

Index inline comments on commits

Summary: Fixes T3044. We currently don't add these to the index.

Test Plan: Made a unique inline comment on a commit, then searched for it.

Reviewers: btrahan, chad

Reviewed By: chad

Subscribers: epriestley

Maniphest Tasks: T3044

Differential Revision: https://secure.phabricator.com/D9170