Bug 872164 - Read in-tree mozharness configs, r=aki
bug 867377 - Support crashtests and jsreftests for Android x86. r=aki
bug 876159 - set self.return_code since buildbot truncates logs. r=philor
bug 876159 - set TBPL_FAILURE if log size > max log size. r=philor
no bug - remove extraneous comment.