Add LED control packet

src/robomaster.c

@@ -61,3 +61,10 @@ set_sdk_connection_req_new (
     struct Message* message = message_new(session, 0x3F, SET_SDK_CONNECTION_CMDID, sizeof(struct SetSdkConnectionReq), msg);
     return message;
 }
+
+const Message
+set_system_led_req_new (
+		Session session,
+		struct SetSystemLedReq* msg ) {
+    return message_new(session, 0x3F, SET_SYSTEM_LED_CMDID, sizeof(struct SetSystemLedReq), msg);
+}