Add missing copyright headers (#2359)

* Add missing copyright headers

* empty commit

[ROCm/composable_kernel commit: df54667102]

example/ck_tile/18_flatmm/script/smoke_test_basic.sh

@@ -1,4 +1,8 @@
 #!/bin/bash
+
+# Copyright © Advanced Micro Devices, Inc., or its affiliates.
+# SPDX-License-Identifier:  MIT
+
 EXE="$(find . -name tile_example_flatmm_basic -type f | head -n 1)"
 KNAME=1