Change licenses

libkmod is under LGPL 2.1 or later
tools/* are under GPL
diff --git a/libkmod/libkmod-module.c b/libkmod/libkmod-module.c
index 3e99c0c..ee1be6d 100644
--- a/libkmod/libkmod-module.c
+++ b/libkmod/libkmod-module.c
@@ -5,7 +5,8 @@
  *
  * 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 version 2.1.
+ * License as published by the Free Software Foundation; either
+ * version 2.1 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