bug 920316, bug 963686 - update gecko.git configs. r=hwine
bug 920316, bug 963686 - update gecko.git configs. r=hwine

--HG--
extra : rebase_source : 305bc1082c205cbbd7edd393af0c5131d0c7d6b3

walac/build-mozharness,armenzg/build-mozharness,lissyx/build-mozharness,kartikgupta0909/build-mozharness,armenzg/build-mozharness,kartikgupta0909/gittest,kartikgupta0909/mozilla-mozharness,escapewindow/mozharness,kartikgupta0909/mozilla-mozharness,mozilla/build-mozharness,lundjordan/mozharness,escapewindow/mozharness,lissyx/build-mozharness,lundjordan/mozharness,kartikgupta0909/build-mozharness,mrrrgn/build-mozharness,walac/build-mozharness,kartikgupta0909/gittest,simar7/build-mozharness,simar7/build-mozharness,mozilla/build-mozharness,mrrrgn/build-mozharness