last batch of header files changed to reflect new license (#825)

only remains to update contrib/linux-kernel (@terrelln)

tests/Makefile

@@ -1,13 +1,11 @@
-# ##########################################################################
-# Copyright (c) 2016-present, Yann Collet, Facebook, Inc.
+# ################################################################
+# Copyright (c) 2015-present, Yann Collet, Facebook, Inc.
 # All rights reserved.
 #
-# This Makefile is validated for Linux, macOS, *BSD, Hurd, Solaris, MSYS2 targets
-#
-# 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.
-# ##########################################################################
+# This source code is licensed under both the BSD-style license (found in the
+# LICENSE file in the root directory of this source tree) and the GPLv2 (found
+# in the COPYING file in the root directory of this source tree).
+# ################################################################
 # datagen : Synthetic and parametrable data generator, for tests
 # fullbench  : Precisely measure speed for each zstd inner functions
 # fullbench32: Same as fullbench, but forced to compile in 32-bits mode

tests/test-zstd-speed.py

@@ -1,13 +1,13 @@
 #! /usr/bin/env python3
 
-#
+# ################################################################
 # Copyright (c) 2016-present, Przemyslaw Skibinski, 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.
-#
+# This source code is licensed under both the BSD-style license (found in the
+# LICENSE file in the root directory of this source tree) and the GPLv2 (found
+# in the COPYING file in the root directory of this source tree).
+# ##########################################################################
 
 # Limitations:
 # - doesn't support filenames with spaces

tests/test-zstd-versions.py

@@ -1,14 +1,14 @@
 #!/usr/bin/env python3
 """Test zstd interoperability between versions"""
 
-#
+# ################################################################
 # 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.
-#
+# This source code is licensed under both the BSD-style license (found in the
+# LICENSE file in the root directory of this source tree) and the GPLv2 (found
+# in the COPYING file in the root directory of this source tree).
+# ################################################################
 
 import filecmp
 import glob