jf-common: Fix GPS

 * GPS is amazingly broken on JFLTEXX.
 * Compass is spinning like Captain Jack Sparrow.
 * Generate NMEA sentences on the AP side, and enable use of sensor
   correction.

PS2: Add patched gps-nomsb.conf, this is what CDMA uses.

Change-Id: I4f49911ed7cadb094332bdf21d5b5a3107eb9ed3