message: core: added colon after MAVLink
diff: @@ -164,7 +164,7 @@ void DeviceImpl::process_statustext(const mavlink_message_t &message)
  mavlink_statustext_t statustext;
  mavlink_msg_statustext_decode(&message, &statustext);
  - std::string debug_str = "MAVLink ";
  + std::string debug_str = "MAVLink: ";
  switch (statustext.severity) {
  case MAV_SEVERITY_EMERGENCY:
  