Add license header to `test-ffi'.

* test-suite/standalone/test-ffi: Add license header.

test-suite/standalone/test-ffi

@@ -1,6 +1,23 @@
 #!/bin/sh
 exec guile -q -s "$0" "$@"
 !#
+;;; test-ffi --- Foreign function interface.         -*- Scheme -*-
+;;;
+;;; Copyright (C) 2010 Free Software Foundation, Inc.
+;;;
+;;; This library is free software; you can redistribute it and/or
+;;; modify it under the terms of the GNU Lesser General Public
+;;; License as published by the Free Software Foundation; either
+;;; version 3 of the License, or (at your option) any later version.
+;;;
+;;; This library is distributed in the hope that it will be useful,
+;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+;;; Lesser General Public License for more details.
+;;;
+;;; You should have received a copy of the GNU Lesser General Public
+;;; License along with this library; if not, write to the Free Software
+;;; Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 
 (use-modules (system foreign)
              (rnrs bytevectors)