net: do not skip TestAcceptIgnoreSomeErrors

No code changes, but the test passes here.
And TryBots are happy.

Fixes #8662 maybe

Change-Id: Id37380f72a951c9ad7cf96c0db153c05167e62ed
Reviewed-on: https://go-review.googlesource.com/9778Reviewed-by: Minux Ma <minux@golang.org>

src/net/net_windows_test.go

@@ -16,8 +16,6 @@ import (
 )
 
 func TestAcceptIgnoreSomeErrors(t *testing.T) {
-	t.Skip("skipping temporarily, see issue 8662")
-
 	recv := func(ln Listener) (string, error) {
 		c, err := ln.Accept()
 		if err != nil {