Use device specific fstab file

Change-Id: If4bb27406701c710f04eba01efff36935588e1bc
Update system.prop

Remove persist.sys.use_dithering
This commit automatically enables dithering if bitsPerPixel <= 16
https://github.com/androidarmv6/android_frameworks_native/commit/05f952e8cf2972995f61754dbe4cefb415725881

Update dalvik.vm.heaptargetutilization=0.25
Reduces after boot memory footprint by about 5-8MB

Change-Id: Ie11f42914ccbe71a19406f6251b09f9ec2bce801
Build ril from source (2/3)

Change-Id: I8e784e49e8ac030e50f4495924c44a72c7a2d0c0
Cleanup SD Card mounting

Change-Id: I924e29732fcd40addd40eefe134c398a23dfd6fe