[compiler-rt] [compiler-rt][rtsan] intercept accept4 syscall. (PR #117278)

[Chris Apple via llvm-commits]

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@@ -840,6 +848,9 @@ void __rtsan::InitializeInterceptors() {
   INTERCEPT_FUNCTION(sendto);
   INTERCEPT_FUNCTION(shutdown);
   INTERCEPT_FUNCTION(socket);
+#if SANITIZER_INTERCEPT_ACCEPT4
+  INTERCEPT_FUNCTION(accept4);
+#endif
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cjappl wrote:

Please use the MAYBE syntax you see to conditionally include this here. 

https://github.com/llvm/llvm-project/pull/117278