Track our own libselinux

* some commits were created to support f2fs file system
  and they are needed for Moto X.

Change-Id: Ic6ebfc6fd7bbd44d9c279590e0c5f807b610320a
Signed-off-by: Brandon McAnsh <brandon.mcansh@gmail.com>
Merge remote-tracking branch 'upstream/jb-mr2' into jb-mr2