Adds generator support for Xcode 5 xctest targets.

test/mac/xctest/test.gyp

Index: test/mac/xctest/test.gyp
===================================================================
--- test/mac/xctest/test.gyp	(revision 0)
+++ test/mac/xctest/test.gyp	(working copy)
@@ -0,0 +1,47 @@
+# Copyright (c) 2013 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': 'classes',
+      'type': 'static_library',
+      'sources': [
+        'MyClass.h',
+        'MyClass.m',
+      ],
+      'link_settings': {
+        'libraries': [
+          '$(SDKROOT)/System/Library/Frameworks/Foundation.framework',
+        ],
+      },
+    },
+    {
+      'target_name': 'tests',
+      'type': 'loadable_module',
+      'mac_xctest_bundle': 1,
+      'sources': [
+        'TestCase.m',
+      ],
+      'dependencies': [
+        'classes',
+      ],
+      'mac_bundle_resources': [
+        'resource.txt',
+      ],
+      'xcode_settings': {
+        'WRAPPER_EXTENSION': 'xctest',
+        'FRAMEWORK_SEARCH_PATHS': [
+          '$(inherited)',
+          '$(DEVELOPER_FRAMEWORKS_DIR)',
+        ],
+        'OTHER_LDFLAGS': [
+          '$(inherited)',
+          '-ObjC',
+        ],
+      },
+    },
+  ],
+}
+