Adjust test to run on no-IPv6 machines, update status file

tests/standalone/io/http_bind_test.dart

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 import 'dart:async';
 import 'dart:io';
 import 'dart:convert';
 
 import 'package:async_helper/async_helper.dart';
 import 'package:expect/expect.dart';
@@ skipping 41 matching lines @@
   await singleRequest(host, port, 502);
   await server2.close();
 
   await server1Request.future;
   await server2Request.future;
 
   asyncEnd();
 }
 
 void main() {
-  for (var host in ['127.0.0.1', '::1']) {
-    testBindShared(host, false);
-    testBindShared(host, true);
+  // Please don't change this to use await/async.
+  asyncStart();
+  supportsIPV6().then((ok) {
+    var addresses = ['127.0.0.1'];
+    if (ok) {
+      addresses.add('::1');
+    }
+    var futures = [];
+    for (var host in addresses) {
+      futures.add(testBindShared(host, false));
+      futures.add(testBindShared(host, true));
+    }
+    Future.wait(futures).then((_) => asyncEnd());
+  });
+}
+
+bool supportsIPV6() async {
+  try {
+    var socket = await ServerSocket.bind('::1', 0);
+    await socket.close();
+    return true;
+  } catch (e) {
+    print(e);
+    return false;
   }
 }