AP_InertialSensor → AP_Math Relation

File in libraries/AP_InertialSensor	Includes file in libraries/AP_Math
AP_InertialSensor.cpp	AP_Math.h
AP_InertialSensor.h	AP_Math.h
AP_InertialSensor_Backend.h	AP_Math.h
AP_InertialSensor_BMI160.cpp	AP_Math.h
AP_InertialSensor_Invensense.h	AP_Math.h
AP_InertialSensor_Revo.h	AP_Math.h
AP_InertialSensor_RST.cpp	AP_Math.h
examples / VibTest / VibTest.cpp	AP_Math.h