feat(core): update date of some files

coreapi/account_creator.c

 /*
 linphone
-Copyright (C) 2010-2017 Belledonne Communications SARL
+Copyright (C) 2010-2018 Belledonne Communications SARL
 
 This program is free software; you can redistribute it and/or
 modify it under the terms of the GNU General Public License

coreapi/core_private.h

 /*
  * core_private.h
- * Copyright (C) 2010-2017 Belledonne Communications SARL
+ * Copyright (C) 2010-2018 Belledonne Communications SARL
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License

coreapi/private_functions.h

 /*
  * private_functions.h
- * Copyright (C) 2010-2017 Belledonne Communications SARL
+ * Copyright (C) 2010-2018 Belledonne Communications SARL
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License

coreapi/private_structs.h

 /*
  * private_structs.h
- * Copyright (C) 2010-2017 Belledonne Communications SARL
+ * Copyright (C) 2010-2018 Belledonne Communications SARL
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License

coreapi/private_types.h

 /*
  * private_types.h
- * Copyright (C) 2010-2017 Belledonne Communications SARL
+ * Copyright (C) 2010-2018 Belledonne Communications SARL
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License

coreapi/video_definition.c

 /*
 linphone
-Copyright (C) 2010-2017 Belledonne Communications SARL
+Copyright (C) 2010-2018 Belledonne Communications SARL
 
 This program is free software; you can redistribute it and/or
 modify it under the terms of the GNU General Public License

include/linphone/account_creator.h

 /*
 account_creator.h
-Copyright (C) 2010-2017 Belledonne Communications SARL
+Copyright (C) 2010-2018 Belledonne Communications SARL
 
 This program is free software; you can redistribute it and/or
 modify it under the terms of the GNU General Public License

include/linphone/api/c-address.h

 /*
  * c-address.h
- * Copyright (C) 2010-2017 Belledonne Communications SARL
+ * Copyright (C) 2010-2018 Belledonne Communications SARL
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License

include/linphone/api/c-api.h

 /*
  * c-api.h
- * Copyright (C) 2010-2017 Belledonne Communications SARL
+ * Copyright (C) 2010-2018 Belledonne Communications SARL
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License

include/linphone/api/c-call-cbs.h

 /*
  * c-call-cbs.h
- * Copyright (C) 2010-2017 Belledonne Communications SARL
+ * Copyright (C) 2010-2018 Belledonne Communications SARL
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License

include/linphone/api/c-call-stats.h

 /*
  * c-call-stats.h
- * Copyright (C) 2010-2017 Belledonne Communications SARL
+ * Copyright (C) 2010-2018 Belledonne Communications SARL
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License

include/linphone/api/c-call.h

 /*
  * c-call.h
- * Copyright (C) 2010-2017 Belledonne Communications SARL
+ * Copyright (C) 2010-2018 Belledonne Communications SARL
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License

include/linphone/api/c-callbacks.h

 /*
  * c-callbacks.h
- * Copyright (C) 2010-2017 Belledonne Communications SARL
+ * Copyright (C) 2010-2018 Belledonne Communications SARL
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License

include/linphone/api/c-chat-message-cbs.h

 /*
  * c-chat-message-cbs.h
- * Copyright (C) 2010-2017 Belledonne Communications SARL
+ * Copyright (C) 2010-2018 Belledonne Communications SARL
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License

include/linphone/api/c-chat-message.h

 /*
  * c-chat-message.h
- * Copyright (C) 2010-2017 Belledonne Communications SARL
+ * Copyright (C) 2010-2018 Belledonne Communications SARL
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License

include/linphone/api/c-chat-room-cbs.h

 /*
  * c-chat-room-cbs.h
- * Copyright (C) 2010-2017 Belledonne Communications SARL
+ * Copyright (C) 2010-2018 Belledonne Communications SARL
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License

include/linphone/api/c-chat-room.h

 /*
  * c-chat-room.h
- * Copyright (C) 2010-2017 Belledonne Communications SARL
+ * Copyright (C) 2010-2018 Belledonne Communications SARL
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License

include/linphone/api/c-dial-plan.h

 /*
  * c-dial-plan.h
- * Copyright (C) 2010-2017 Belledonne Communications SARL
+ * Copyright (C) 2010-2018 Belledonne Communications SARL
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License

include/linphone/api/c-event-log.h

 /*
  * c-event-log.h
- * Copyright (C) 2010-2017 Belledonne Communications SARL
+ * Copyright (C) 2010-2018 Belledonne Communications SARL
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License

include/linphone/api/c-participant.h

 /*
  * c-participant.h
- * Copyright (C) 2010-2017 Belledonne Communications SARL
+ * Copyright (C) 2010-2018 Belledonne Communications SARL
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License