Update the list of authors in libao driver sources

drivers/ao/audio_driver_ao.cpp

@@ -6,6 +6,7 @@
 /*                    http://www.godotengine.org                         */
 /*************************************************************************/
 /* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.                 */
+/* Copyright (c) 2014 Anton Yabchinskiy.                                 */
 /*                                                                       */
 /* Permission is hereby granted, free of charge, to any person obtaining */
 /* a copy of this software and associated documentation files (the       */

drivers/ao/audio_driver_ao.h

@@ -6,6 +6,7 @@
 /*                    http://www.godotengine.org                         */
 /*************************************************************************/
 /* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.                 */
+/* Copyright (c) 2014 Anton Yabchinskiy.                                 */
 /*                                                                       */
 /* Permission is hereby granted, free of charge, to any person obtaining */
 /* a copy of this software and associated documentation files (the       */