am d8221d98: vold: vfat: Run up to 3 passes of the disk checker when the checker indicates the FS has been modified. Also create LOST.DIR if it doesn\'t exist on mount.

Merge commit 'd8221d9869f9fe1031219e8f6cbcef0771d767fa'

* commit 'd8221d9869f9fe1031219e8f6cbcef0771d767fa':
  vold: vfat: Run up to 3 passes of the disk checker when the checker