Use prebuilt kernel

Change-Id: I818b4822b653d11c84c53e4f2781b1f00a195ec3
Patch for block_based_ota
This patch will allow us to choose or that we are going to use  block based ota
or not. Until Cyanogenmod also officially implents this we are going to use this
patch cause else we will get a magic error while making the package.
This patch will be removed when Cyanogenmod officially implents this.

Change-Id: If9293a8eb4a51e31764db6ee466079f06c8bd9b8