[core] Test commit- bump copyright date.

src/switch_core_media.c

 /*
  * FreeSWITCH Modular Media Switching Software Library / Soft-Switch Application
- * Copyright (C) 2005-2014, Anthony Minessale II <anthm@freeswitch.org>
+ * Copyright (C) 2005-2018, Anthony Minessale II <anthm@freeswitch.org>
  *
  * Version: MPL 1.1
  *