Fix XCObject._EncodeString() for unicode characters.

test/mac/unicode-settings/test.gyp

 # Copyright (c) 2012 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_app',
-      'product_name': 'Test',
+      'target_name': 'myapp',
       'type': 'executable',
       'mac_bundle': 1,
-      'sources': [ 'main.c', ],
+      'sources': [ 'file.cc', ],
       'xcode_settings': {
-        'INFOPLIST_FILE': 'Info.plist',
+        'BUNDLE_DISPLAY_NAME': 'α\011',
       },
       'postbuilds': [
         {
-          'postbuild_name': 'Postbuild that calls defaults',
-          'action': [
-            './postbuild-defaults.sh',
-            '${BUILT_PRODUCTS_DIR}/${EXECUTABLE_PATH}',
-          ],
+          'postbuild_name': 'envtest',
+          'action': [ './test_bundle_display_name.sh', ],
         },
       ],
     },
   ],
 }