Audit - add ability to add a package as an auditor

Summary: Fixes T4687. This was also pretty easy...!

Test Plan: made a package with a test user as owner. added package as owner. looked right on commit page. logged in as test user and verified audit showed up on home page.

Reviewers: epriestley

Reviewed By: epriestley

Subscribers: chad, epriestley, Korvin

Maniphest Tasks: T4687

Differential Revision: https://secure.phabricator.com/D8705

src/applications/diffusion/controller/DiffusionCommitController.php

@@ -778,9 +778,9 @@ final class DiffusionCommitController extends DiffusionController {
         'dynamic' => array(
           'add-auditors-tokenizer' => array(
             'actions' => array('add_auditors' => 1),
-            'src' => '/typeahead/common/usersorprojects/',
+            'src' => '/typeahead/common/usersprojectsorpackages/',
             'row' => 'add-auditors',
-            'placeholder' => pht('Type a user or project name...'),
+            'placeholder' => pht('Type a user, project, or package name...'),
           ),
           'add-ccs-tokenizer' => array(
             'actions' => array('add_ccs' => 1),