[HIP][tests] Copyright notice update

[ROCm/clr commit: 7664560f14]
2019-05-20 18:46:23 +03:00
Commit fef3e849eb
@@ -1,5 +1,5 @@
 /*
-Copyright (c) 2015-2016 Advanced Micro Devices, Inc. All rights reserved.
+Copyright (c) 2015-present Advanced Micro Devices, Inc. All rights reserved.

 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal