system.prop: set UMS mode to mtp by default

Change-Id: I91aca8210b8143b17f9cb60b43fe56db7a33c48e
ramdisk: update load-modem.sh permissions

Change-Id: I179d7e2c13d6fb090f2ca88304841e114013acbb
BoardConfig: Enable board wants emmc boot flag.

This hopefully will fix our need for a prebuilt init binary

Change-Id: Id72408631d071cb1cd4ebdd873f80865da5b5b32
holiday: update fstab external sd mount path

Use original path from old vold.fstab