move libexfat and fuse to be compiled with mkexfatfs
change tar create to pthread

Change-Id: I5a33d207ec6683de20da37e6f4f174c67785fc52
Disable USB Mass Storage if the USB lun file does not exist.

Change-Id: I185edb4538fa84c17fc2b9a803557bb7a622f880
Output most build flags to log

Change-Id: I28f62236c5d5fa882cb5c05973ebf84da006b9ff
Convert AOSP commands to ORS for encrypted devices

Change-Id: I6a76a51cd9efd7db67d7abeeb26f9bdd0eebf5a9