Adding missing dependencies for dart executable on OSX

runtime/bin/bin.gypi

 # Copyright (c) 2012, 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.
 
 {
   'variables': {
     'gen_source_dir': '<(SHARED_INTERMEDIATE_DIR)',
 
     'io_cc_file': '<(gen_source_dir)/io_gen.cc',
     'io_patch_cc_file': '<(gen_source_dir)/io_patch_gen.cc',
@@ skipping 186 matching lines @@
           # enabled.  That should be addressed using -A
           # versions of functions and adding necessary conversions.
           'configurations': {
             'Common_Base': {
               'msvs_configuration_attributes': {
                 'CharacterSet': '0',
               },
             },
           },
         }],
+        ['OS=="mac"', {
+          'link_settings': {
+            'libraries': [
+              '$(SDKROOT)/System/Library/Frameworks/CoreFoundation.framework',
+              '$(SDKROOT)/System/Library/Frameworks/CoreServices.framework',
+            ],
+          },
+        }],
       ],
       'configurations': {
         'Dart_Android_Base': {
           'target_conditions': [
             ['_toolset=="target"', {
               'defines': [
                 # Needed for sources outside of nss that include pr and ssl
                 # header files.
                 'MDCPUCFG="md/_linux.cfg"',
               ],
@@ skipping 366 matching lines @@
         }],
         ['OS=="linux"', {
           'cflags': [
             '-fPIC',
           ],
         }],
       ],
     },
   ],
 }