add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/tools/build/feature/test-sched_getcpu.c
..
..
@@ -8,3 +8,5 @@
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 {
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 	return sched_getcpu();
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 }
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+
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+#undef _GNU_SOURCE