Yo

Change-Id: Ib1d08d4e15f61a7524b03ab9a1816a99d0dbbf7e
Revert "Yo"

This reverts commit 1c523b93dcc44332c99ea4241d334f381e17a943.
build: Add support for extra kernel build variables

 * This allows specifying a variant defconfig, and an selinux defconfig
   which are simply configuration fragments.

Change-Id: I97882ae3b8c2e16ff6a7dce8dd3a70d70f8aa866

Conflicts:
	core/tasks/kernel.mk
Extract 50-slim.sh before we run backuptool

This lets us add things to 50-slim to be preserved in new ROM releases

Change-Id: I90f2b4ca1e534e0bb2370c7157a10e0e6282c84b