Add recoveryzip target. Import recovery building/porting tools.

echo args

Change-Id: Ib346a27d94ccab3e992fe3bc3be9e0010e7b89a0

mkvendor.sh: fixes for Android 4.2.

Change-Id: Id7ff9ef03700d595734811ccf868371ffb024384

mkvendor: fix echoed build commands

cm.mk.template uses PRODUCT_NAME := cm___DEVICE__

Change-Id: I063fc4b93d90ebb034637bf3e92d83c77aa439ca