Backed out changeset 1ee5030003af (bug 451283) failures in marionette and mochitests
Backed out changeset 2f67ed3d7d6c (bug 451283) failures in mochitest and marionette

--HG--
rename : toolkit/modules/Log.jsm => services/common/log4moz.js
rename : toolkit/modules/tests/xpcshell/test_Log.js => services/common/tests/unit/test_log4moz.js