AP_Math: fixed location build on SITL
AP_GPS: Support fix types of DGPS and RTK
SITL: Adding Swift Binary Protocol GPS type
AP_MATH: Adding WGS GPS conversions, CRC16 checks, and double-precision Vectors and Matrices
SITL: Adding GPS types for Swift Binary Protocol
 AP_HAL_AVR_SITL: Adding Swift Binary Protocol stand-alone simulator