Set TARGET_CPU_VARIANT

Change-Id: I4c76387fb4f7ab3e85ddd08cf0b8e80eb63963df
Don't build usb audio

Change-Id: I5fcc1e148d91969b36a57bda127af600370d5323
Move sdcard mount points to fstab, kill vold.fstab

Change-Id: Icf58cb64a581ba825e8ab6db420305f0e7141e94
Migrate recovery fstab entries to new unified format

Change-Id: Iaf581e6ff9b37a89bcf9fba34cfce72378b1ae0b