rocr: Add copyright for new files (#886)

Signed-off-by: Alysa Liu <Alysa.Liu@amd.com>

projects/rocr-runtime/rocrtst/Kernels/write_kernel.cl

@@ -1,4 +1,9 @@
-
+/*
+ * Copyright © Advanced Micro Devices, Inc., or its affiliates. 
+ * 
+ * SPDX-License-Identifier: MIT
+ */
+ 
 /**
  * @brief Opencl kernel to write into a buffer the values of const integer list
  *