add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/tools/build/feature/test-sync-compare-and-swap.c
..
..
@@ -7,7 +7,7 @@
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 {
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 	uint64_t old, new = argc;
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-	argv = argv;
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+	(void)argv;
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 	do {
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 		old = __sync_val_compare_and_swap(&x, 0, 0);
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 	} while (!__sync_bool_compare_and_swap(&x, old, new));