Do not test RECVTOS on OpenBSD.

Niklas Hallqvist · Thomasdezeeuw · commit 3f5e62c4f183 · 2022-08-31T14:19:27.000Z
diff --git a/tests/socket.rs b/tests/socket.rs
@@ -1190,6 +1190,7 @@ test!(IPv4 tos, set_tos(96));
     target_os = "fuchsia",
     target_os = "illumos",
     target_os = "netbsd",
+    target_os = "openbsd",
     target_os = "redox",
     target_os = "solaris",
     target_os = "windows",
