Add test directive to include other files used by a test in its compiled output directory.

tests/standalone/io/https_bad_certificate_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.
 
+// OtherResources=certificates/server_chain.pem
+// OtherResources=certificates/server_key.pem
+// OtherResources=certificates/trusted_certs.pem
+
 // This test verifies that the bad certificate callback works in HttpClient.
 
 import "dart:async";
 import "dart:io";
 
 import "package:expect/expect.dart";
 
 final HOST_NAME = 'localhost';
 
 String localFile(path) => Platform.script.resolve(path).toFilePath();
@@ skipping 58 matching lines @@
     if (result == 'fail') {
       Expect.isTrue(error is HandshakeException ||
           (callbackReturns is! bool && error is TypeError));
     } else if (result == 'throw') {
       Expect.isTrue(error is CustomException);
     } else {
       Expect.fail('Unknown expectation $result');
     }
   }
 }