autotest: allow EKF3 more time to learn wind in DeadreckoningNoAirspeed

the estimates kind of converge eventually, but it takes a long time

Author: peterbarker

Tools/autotest/arduplane.py

@@ -2029,7 +2029,7 @@ def deadreckoning_main(self, disable_airspeed_sensor=False):
             self.progress("Orbit with GPS and learn wind")
             # allow longer to learn wind if there is no airspeed sensor
             if disable_airspeed_sensor:
-                self.delay_sim_time(60)
+                self.delay_sim_time(90)
             else:
                 self.delay_sim_time(20)
             self.set_parameter("SIM_GPS1_ENABLE", 0)