Improve voicing in text published to JIRA issues

Summary:
Ref T3687. JIRA is able to piggyback on a fair amount of Asana infrastructure, but the voicing we use on Asana tasks (which are always about one object) isn't very good for JIRA issues (which may have many linked objects). Specifically, we publish stories like this to Asana:

  alincoln accepted this revision.

This is meaningless in JIRA since you have no idea what it's talking about. Instead, publish like this:

  alincoln accepted D999: Put a bird on it

Additionally, supplement it with a URI, so the total story text we publish is:

  alincoln accepted D999: Put a bird on it

  https://phabricator.whitehouse.gov/D999

Signifcantly less useless!

Test Plan: {F57523} {F57524}

Reviewers: btrahan

Reviewed By: btrahan

CC: aran

Maniphest Tasks: T3687

Differential Revision: https://secure.phabricator.com/D6907