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

Change-Id: I089dfb4a44b54c95c2a346bee31d69fcb0919133
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
Bug 1011958 - ICS build bustage in out/host/linux-x86/obj/EXECUTABLES/triangleCM_intermediates/triangleCM,r=edmorley
Bug 1010652 - [Vixen][Tablet] Integrate vixen manifest file. r=mwu