Added cygwin license to winsyslog.c/h

Change-Id: Ia84528a510493298f1e3d523d7e498a01f799fa4
Tuleap: #350

src/winsyslog.c

 /*
  * This header borrowed from Cygnus GNUwin32 project
  *
+ * Cygwin is free software.  Red Hat, Inc. licenses Cygwin to you under the
+ * terms of the GNU General Public License as published by the Free Software
+ * Foundation; you can redistribute it and/or modify it under the terms of
+ * the GNU General Public License either version 3 of the license, or (at your
+ * option) any later version (GPLv3+), along with the additional permissions
+ * given below.
+ *
  * Modified for use with functions to map syslog
  * calls to EventLog calls on the windows platform
  *

src/winsyslog.h

 /*
  * This header borrowed from Cygnus GNUwin32 project
  *
+ * Cygwin is free software.  Red Hat, Inc. licenses Cygwin to you under the
+ * terms of the GNU General Public License as published by the Free Software
+ * Foundation; you can redistribute it and/or modify it under the terms of
+ * the GNU General Public License either version 3 of the license, or (at your
+ * option) any later version (GPLv3+), along with the additional permissions
+ * given below.
+ *
  * Modified for use with functions to map syslog
  * calls to EventLog calls on the windows platform
  *