R1:41b3f9236a77

Allow lint and unit results to be reported via `harbormaster.sendmessage`

Summary:
Ref T8095. When build results are reported for a target, allow them to include unit and lint results.

There is no real way to see this stuff in the UI yet, either in Harbormaster or Differential.

Test Plan: Manually called this method with some results, saw Harbormaster update appropriately.

Reviewers: btrahan

Reviewed By: btrahan

Subscribers: epriestley

Maniphest Tasks: T8095

Differential Revision: https://secure.