jf: Enable use of two stop bits for BT

 * Improves reliability

Change-Id: Id265ad4758b6eacdf56ec0843c282aaa7ed9c8a7
jf: Underp BT tethering

Change-Id: I374b478cdc6b10220ee71ee7fd330e6f18e71b82
Merge "jf: Enable use of two stop bits for BT" into jb4.3
Merge "jf: Underp BT tethering" into jb4.3
jf: Add back unoffical api support for opencl and openvg.

http://www.anandtech.com/show/7191/android-43-update-for-nexus-10-and-4-removes-unofficial-opencl-drivers

Change-Id: Ib908b0c20c4bc8dd889d0d228ee3ea63820b98cf