mac_aura try bot should run aura_shell_unittest
mac_aura try bot should run aura_shell_unittest

Adds aura_shell_unittests to the mac_aura try bot's list of tests

BUG=110627
TEST=Run try and inspect stdio for aura_shell_unittest output.
R=maruel@chromium.org

Review URL: http://codereview.chromium.org/9328014

git-svn-id: 239fca9b83025a0b6f823aeeca02ba5be3d9fd76@120454 0039d316-1c4b-4281-b951-d872f2087c98

eunchong/build,eunchong/build,eunchong/build,eunchong/build