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

tests/standalone/io/secure_bad_certificate_test.dart

Index: tests/standalone/io/secure_bad_certificate_test.dart
diff --git a/tests/standalone/io/secure_bad_certificate_test.dart b/tests/standalone/io/secure_bad_certificate_test.dart
index 7b2828479d39a18a265651f118f6ef9c46df5bfc..c4e81cc7b595ca1e3df3715d1441f18ab1e5cb00 100644
--- a/tests/standalone/io/secure_bad_certificate_test.dart
+++ b/tests/standalone/io/secure_bad_certificate_test.dart
@@ -2,6 +2,10 @@
 // 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.
 
 import "dart:async";