Bug 838321: Use b2g manifests to checkout b2g sources. r=aki
Bug 838321: add missing file from previous commit. r=bustage
bug 840305 - mozharness run_command() idle timeouts. r=catlee
bug 813022 - update makefile error list for tbpl. r=edmorley
Bug 847442. Metro test jobs. r=aki
revert d83f0ecb2b6b to see if it helps with osx test oranges.