Bug 997469: switch kitkat emulator kernel to b2g-4.4.2_r1 branch

Change-Id: I089dfb4a44b54c95c2a346bee31d69fcb0919133
Bug 983013: add darwin toolchains to flatfish

Change-Id: I1ae465fab6e441c9295206ea244ee259d48dcfc6
Merge pull request #165 from vicamo/bugzilla/983013/flatfish-on-mac-mavericks

Bug 983013: add darwin toolchains to flatfish. r=mwu
Merge pull request #178 from vicamo/bugzilla/997469/update-kk-qemu-kernel-4.4.2_r1

Bug 997469: switch kitkat emulator kernel to b2g-4.4.2_r1 branch. r=mwu
use local aosp/mozillaorg mirror

Change-Id: I9d43700cff3b1678830adf8c2906748424f17138