releasetools: update extras for omnirom

Change-Id: I5fa8d31751c1aa188199992aa988d395990c1e87
add DeviceSettings support API

Change-Id: If22a14da2202610d2037c318c63813d5478ec7c6
drop ro.config.low_ram=true property

Change-Id: I9ec8e7d088d2eb91c9ccb448ef9ad3921ef4e20d
build the ar6000.ko from src instead of using the prebuilt

re-arrange the location of the wifi firmware too
DeviceSettings: add vibrator tuning

Change-Id: I449e37ca72ac9bfaa8044980da9f09450a77c16e
disable button backlight by default

Change-Id: Ia8d1d6d990c82bc3c60b841ae0cd3ee5e4ab38f6