Copter: more complete RC output reporting to GCS

Radio outputs are pulled from hal.rcout instead of from motors library
which provides more complete reporting because it includes output from
sources like the camera and mount libraries.

ArduCopter/GCS_Mavlink.pde

@@ -413,18 +413,27 @@ static void NOINLINE send_radio_in(mavlink_channel_t chan)
 
 static void NOINLINE send_radio_out(mavlink_channel_t chan)
 {
+    uint8_t i;
+    uint16_t rcout[8];
+    hal.rcout->read(rcout,8);
+    // clear out unreasonable values
+    for (i=0; i<8; i++) {
+        if (rcout[i] > 10000) {
+            rcout[i] = 0;
+        }
+    }
     mavlink_msg_servo_output_raw_send(
         chan,
         micros(),
         0, // port
-        motors.motor_out[AP_MOTORS_MOT_1],
-        motors.motor_out[AP_MOTORS_MOT_2],
-        motors.motor_out[AP_MOTORS_MOT_3],
-        motors.motor_out[AP_MOTORS_MOT_4],
-        motors.motor_out[AP_MOTORS_MOT_5],
-        motors.motor_out[AP_MOTORS_MOT_6],
-        motors.motor_out[AP_MOTORS_MOT_7],
-        motors.motor_out[AP_MOTORS_MOT_8]);
+        rcout[0],
+        rcout[1],
+        rcout[2],
+        rcout[3],
+        rcout[4],
+        rcout[5],
+        rcout[6],
+        rcout[7]);
 }
 
 static void NOINLINE send_vfr_hud(mavlink_channel_t chan)