Patch some (c) messages

Marlin/Marlin.ino

 
   Marlin Firmware
 
-  (c) 2011-2018 MarlinFirmware
+  (c) 2011-2019 MarlinFirmware
   Portions of Marlin are (c) by their respective authors.
   All code complies with GPLv2 and/or GPLv3
 

Marlin/src/pins/mega/pins_OVERLORD.h

 /**
  * Marlin 3D Printer Firmware
- * Copyright (C) 2016 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ * Copyright (c) 2019 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
  *
  * Based on Sprinter and grbl.
- * Copyright (C) 2011 Camiel Gubbels / Erik van der Zalm
+ * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by