internal/socket: skip known flaky TestRace

This test keeps flaking on almost every TryBot run. Skip it for now.

For golang/go#37338

Change-Id: I77cdd782f3bc164ec11894683aa50c3441807ba5
Reviewed-on: https://go-review.googlesource.com/c/net/+/303910
Trust: Tobias Klauser <[email protected]>
Run-TryBot: Tobias Klauser <[email protected]>
Reviewed-by: Emmanuel Odeke <[email protected]>
Reviewed-by: Bryan C. Mills <[email protected]>
TryBot-Result: Go Bot <[email protected]>

Author: tklauser

internal/socket/socket_test.go

@@ -304,6 +304,8 @@ func BenchmarkUDP(b *testing.B) {
 }
 
 func TestRace(t *testing.T) {
+	t.Skip("skipping known flaky test; see https://golang.org/issue/37338")
+
 	tests := []string{
 		`
 package main