Add additional asserts for install package

Change-Id: I703c1418ea2b188e00e3437f5ee39d83e8e5a1e1
Recovery: Twrp: Add support for twrp.fstab

Change-Id: I7ae1fccf4d9abd9124f94d558c18b84dd9ae1ee1
Merge remote-tracking branch 'upstream/cm-10.2' into slim4.3

TWRP stuff