Rolling in a new version of gyp.

This will generate prettier looking sln files.

Review URL: http://codereview.chromium.org/113979

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@17138 0039d316-1c4b-4281-b951-d872f2087c98

DEPS

@@ -26,7 +26,7 @@ deps = {
 
   # TODO(mark): Remove once this has moved into depot_tools.
   "src/tools/gyp":
-    "http://gyp.googlecode.com/svn/trunk@498",
+    "http://gyp.googlecode.com/svn/trunk@500",
 
   "src/v8":
     "http://v8.googlecode.com/svn/trunk@2055",