Bug 1046815: Update mozharness configs

This almost re-syncs our mozharness config files with the "real" ones in mozharness. The remaining differences are a few references to /tools; I am trying to sort out those differences with Release Engineering, but that may take some time.
Why not? Current b2g emulator jobs in production upload qemu.log and emulator-5554.log for each test. I find blobber really convenient.