Enable turning on analyzer build in sdk for macs.

dart.gyp

 # 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.
 
 {
   'targets': [
     {
       'target_name': 'compiler',
       'type': 'none',
       'dependencies': [
@@ skipping 34 matching lines @@
           'outputs': [
             '<(PRODUCT_DIR)/dart-sdk/create.stamp',
           ],
           'action': [
             'python',
             'tools/create_sdk.py',
             '<(PRODUCT_DIR)/dart-sdk',
           ],
           'message': 'Creating SDK.',
           'conditions' : [
-            ['OS=="linux"', {
+            ['(OS=="linux" or OS=="mac") ', {
               'inputs' : [
                 '<(PRODUCT_DIR)/analyzer/bin/dart_analyzer'
               ],
             }],
           ],
         },
       ],
       'conditions' : [
-        ['OS=="linux"', {
+        ['(OS=="linux" or OS=="mac") ', {
           'dependencies': [
             'compiler',
           ],
         }],
       ],
     },
     {
       # Upload the SDK. This target is separate from create_sdk as the
       # editor needs to build the SDK without uploading it.
       'target_name': 'upload_sdk',
@@ skipping 28 matching lines @@
     },
     {
       'target_name': 'api_docs',
       'type': 'none',
       'dependencies': [
         'utils/apidoc/apidoc.gyp:api_docs',
       ],
     }
   ],
 }