Tracker: allow for "in-flight" compass learning

AntennaTracker/AntennaTracker.cpp

@@ -115,6 +115,10 @@ void Tracker::one_second_loop()
             set_home(temp_loc);
         }
     }
+
+    // need to set "likely flying" when armed to allow for compass
+    // learning to run
+    ahrs.set_likely_flying(hal.util->get_soft_armed());
 }
 
 void Tracker::ten_hz_logging_loop()