hammerhead: switch kernel to kk_mr2 branch

Change-Id: Ic83af6e8ec144a79675d094cecce668cd8d893f2
Signed-off-by: Dan Trifan <jimsth@gmail.com>
Revert "Move 4.4.3 to kk443 until it works gud"

This reverts commit 015fb344f647dbd8be2226109e79fecba22a8167.

Change-Id: I5f9e11ec3b3522864b9c7129e1aaa901220889bd

Conflicts:

	default.xml
vanir chromium openssl

Change-Id: I8fb946c4200a47cf636e82bc9d921a71bbe9e5ba