AP_Proximity: move location_update to Location and rename to offset_bearing

libraries/AP_Proximity/AP_Proximity_SITL.cpp

@@ -107,7 +107,7 @@ bool AP_Proximity_SITL::get_distance_to_fence(float angle_deg, float &distance)
     while (max_dist - min_dist > PROXIMITY_ACCURACY) {
         float test_dist = (max_dist+min_dist)*0.5f;
         Location loc = current_loc;
-        location_update(loc, angle_deg, test_dist);
+        loc.offset_bearing(angle_deg, test_dist);
         Vector2l vecloc(loc.lat, loc.lng);
         if (fence_loader.boundary_breached(vecloc, fence_count->get(), fence)) {
             max_dist = test_dist;

libraries/AP_Proximity/AP_Proximity_SITL.h

@@ -5,6 +5,7 @@
 #if CONFIG_HAL_BOARD == HAL_BOARD_SITL
 #include <SITL/SITL.h>
 #include <AC_Fence/AC_PolyFence_loader.h>
+#include <AP_Common/Location.h>
 
 class AP_Proximity_SITL : public AP_Proximity_Backend
 {