make Intl non-enumerable

R=jochen@chromium.org, svenpanne@chromium.org
BUG=

Review URL: https://codereview.chromium.org/21213003

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@15974 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/extensions/i18n/footer.js

@@ -37,4 +37,4 @@ var CLEANUP_RE = new RegExp('');
 CLEANUP_RE.test('');
 
 return Intl;
-}());
+}())});

src/extensions/i18n/header.js

@@ -34,7 +34,7 @@
  * Intl object is a single object that has some named properties,
  * all of which are constructors.
  */
-var Intl = (function() {
+Object.defineProperty(this, "Intl", { enumerable: false, value: (function() {
 
 'use strict';