tests/winetricks-test: add copyright and license notice

History before 2011 can be seen in:
git clone https://github.com/dankegel/winezeug.git
git clone https://github.com/austin987/winezeug.git
git clone https://bitbucket.org/kauble/winezeug-archaeology.git

tests/winetricks-test

@@ -1,5 +1,15 @@
 #!/bin/sh
 # Regression test for winetricks
+#
+# Copyright (C) 2010-2014 Dan Kegel
+# Copyright (C) 2011-2017 Austin English
+# See also copyright notice in src/winetricks.
+#
+# This software comes with ABSOLUTELY NO WARRANTY.
+#
+# This is free software, placed under the terms of the GNU Lesser
+# Public License version 2.1 (or later), as published by the Free
+# Software Foundation. Please see the file COPYING for details.
 
 # TODO:
 # add selfupdate tests