msg: Add EKF solution status flags to estimator status message

msg/estimator_status.msg

@@ -65,3 +65,16 @@ float32 pos_test_ratio # ratio of the largest horizontal position innovation com
 float32 hgt_test_ratio # ratio of the vertical position innovation to the innovation test limit
 float32 tas_test_ratio # ratio of the true airspeed innovation to the innovation test limit
 float32 hagl_test_ratio # ratio of the height above ground innovation to the innovation test limit
+uint16 solution_status_flags # Bitmask indicating which filter kinematic state outputs are valid for flight control use.
+# 0 - True if the attitude estimate is good
+# 1 - True if the horizontal velocity estimate is good
+# 2 - True if the vertical velocity estimate is good
+# 3 - True if the horizontal position (relative) estimate is good
+# 4 - True if the horizontal position (absolute) estimate is good
+# 5 - True if the vertical position (absolute) estimate is good
+# 6 - True if the vertical position (above ground) estimate is good
+# 7 - True if the EKF is in a constant position mode and is not using external measurements (eg GPS or optical flow)
+# 8 - True if the EKF has sufficient data to enter a mode that will provide a (relative) position estimate
+# 9 - True if the EKF has sufficient data to enter a mode that will provide a (absolute) position estimate
+# 10 - True if the EKF has detected a GPS glitch
+