X3: Enable KSM
P880: enable echo cancellation for voice communication
ksm tweaks
Enable strict_aliasing
enable use_host_ccache
Update Fingerprint to KOT49H

I know it's 4.4.2, but it's the newest one I could find for grouper

Change-Id: Iee4fe005a9fb67eade0c1df436fbacc0ad4c41fd
Enable app2sd
Fix storage overlay

Change-Id: I92d19c241504a73947e1ff07cf9f941f6e15cf34