Add appengine/gcloud/mustache dependencies.

pkg/gcloud/test/db/model_dbs/duplicate_kind.dart

Index: pkg/gcloud/test/db/model_dbs/duplicate_kind.dart
diff --git a/pkg/gcloud/test/db/model_dbs/duplicate_kind.dart b/pkg/gcloud/test/db/model_dbs/duplicate_kind.dart
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index 0000000000000000000000000000000000000000..89ae7eb02a2b22dc6a6245d79b21c419362fcc53
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+++ b/pkg/gcloud/test/db/model_dbs/duplicate_kind.dart
@@ -0,0 +1,13 @@
+// Copyright (c) 2014, 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.
+
+library gcloud.db.model_test.duplicate_kind;
+
+import 'package:gcloud/db.dart' as db;
+
+@db.Kind()
+class A extends db.Model { }
+
+@db.Kind(name: 'A')
+class B extends db.Model { }