Soporte para fast_charge (1/2)

Change-Id: I4da8686ab975392748591c838d8e02f9dd9311a1
hammerhead: dexopt system to /cache

http://review.cyanogenmod.org/#/c/56059/ set dexopt to /data only
by default.  hammerhead has nearly 700MB on /cache so let's
continue to use it.

Change-Id: I3278efac35ed8871055b80bc4fd3a1a2ca530068
hammerhead: Add hardware tunables support: vibrator

Change-Id: If8049f87b06447e7575083043d52716881facbeb
Signed-off-by: Lorenzo M <djmesias@yahoo.es>

Conflicts:
	init.hammerhead.rc
hammerhead: Add hardware tunables support: display

Change-Id: I4eba7024542c6fb3727272c54a1521aaa662a64e
Signed-off-by: Lorenzo M <djmesias@yahoo.es>
hammerhead: Use CM default overlays

Change-Id: I07f11cf3f8fb4cdefb71d5a10b1b1b8ed88d7aca
Signed-off-by: Lorenzo M <djmesias@yahoo.es>