added boilerplate

tests/test-zstd-versions.py

@@ -1,7 +1,14 @@
 #!/usr/bin/env python3
 """Test zstd interoperability between versions"""
-# Copyright Yann Collet, Przemyslaw Skibinski and Takayuki Matsuoka
-# License GPLv2
+
+#
+# Copyright (c) 2016-present, Yann Collet, Facebook, Inc.
+# All rights reserved.
+#
+# This source code is licensed under the BSD-style license found in the
+# LICENSE file in the root directory of this source tree. An additional grant
+# of patent rights can be found in the PATENTS file in the same directory.
+#
 
 import filecmp
 import glob