Bug 1042068 - Added terminal-notifier to the list of packages that should be installed with homebrew. r=gps

Before, ./mach build would try to use terminal-notifier after building, but would not be able to since it isn't installed.

MozReview-Commit-ID: 4oBAVfOdcNs

--HG--
extra : rebase_source : 0930e9d4dc038e59f18beb85b4911552c76c0eed

python/mozboot/mozboot/osx.py

@@ -315,7 +315,8 @@ class OSXBootstrapper(BaseBootstrapper):
             ('git', 'git'),
             ('autoconf213', HOMEBREW_AUTOCONF213),
             ('gnu-tar', 'gnu-tar'),
-            ('watchman', 'watchman',)
+            ('watchman', 'watchman',),
+            ('terminal-notifier', 'terminal-notifier')
         ]
         self._ensure_homebrew_packages(packages)