Enable custom suffixes for Mac bundles.

test/mac/loadable-module-bundle-product-extension/test.gyp

Index: test/mac/loadable-module-bundle-product-extension/test.gyp
===================================================================
--- test/mac/loadable-module-bundle-product-extension/test.gyp	(revision 0)
+++ test/mac/loadable-module-bundle-product-extension/test.gyp	(revision 0)
@@ -0,0 +1,25 @@
+# Copyright (c) 2014 Google Inc. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+{
+  'targets': [{
+    'target_name': 'test',
+    'type': 'none',
+    'dependencies': ['child_one', 'child_two'],
+  }, {
+    'target_name': 'child_one',
+    'product_name': 'Collide',
+    'product_extension': 'bar',
+    'sources': ['src.cc'],
+    'type': 'loadable_module',
+    'mac_bundle': 1,
+  }, {
+    'target_name': 'child_two',
+    'product_name': 'Collide',
+    'product_extension': 'foo',
+    'sources': ['src.cc'],
+    'type': 'loadable_module',
+    'mac_bundle': 1,
+  }],
+}
+