Hello: convert example from .pde to .cpp

Tools/Hello/make.inc

@@ -0,0 +1,32 @@
+LIBRARIES += AP_ADC
+LIBRARIES += AP_ADC_AnalogSource
+LIBRARIES += AP_AHRS
+LIBRARIES += AP_Airspeed
+LIBRARIES += AP_Baro
+LIBRARIES += AP_Common
+LIBRARIES += AP_Compass
+LIBRARIES += AP_Declination
+LIBRARIES += AP_GPS
+LIBRARIES += AP_HAL
+LIBRARIES += AP_HAL_AVR
+LIBRARIES += AP_HAL_Empty
+LIBRARIES += AP_HAL_PX4
+LIBRARIES += AP_HAL_SITL
+LIBRARIES += AP_InertialSensor
+LIBRARIES += AP_Math
+LIBRARIES += AP_Notify
+LIBRARIES += AP_Param
+LIBRARIES += AP_Progmem
+LIBRARIES += AP_Vehicle
+LIBRARIES += DataFlash
+LIBRARIES += Filter
+LIBRARIES += GCS_MAVLink
+LIBRARIES += SITL
+LIBRARIES += AP_NavEKF
+LIBRARIES += AP_RangeFinder
+LIBRARIES += AP_Mission
+LIBRARIES += AP_Rally
+LIBRARIES += AP_Terrain
+LIBRARIES += AP_OpticalFlow
+LIBRARIES += StorageManager
+