disable kernel build waring

hc

2024-05-10 093a6c67005148ae32a5c9e4553491b9f5c2457b

 kernel/tools/testing/selftests/kvm/lib/elf.c
..
..
@@ -1,9 +1,8 @@
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+// SPDX-License-Identifier: GPL-2.0-only
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 /*
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  * tools/testing/selftests/kvm/lib/elf.c
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  *
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  * Copyright (C) 2018, Google LLC.
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- *
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- * This work is licensed under the terms of the GNU GPL, version 2.
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  */
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 #include "test_util.h"