[NaCl SDK] Fix typo in manifest file, causing red SDK bots

BUG=none
TEST=manual
TBR=binji@chromium.org
Review URL: https://chromiumcodereview.appspot.com/10277002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@134789 0039d316-1c4b-4281-b951-d872f2087c98

native_client_sdk/src/build_tools/json/naclsdk_manifest0.json

@@ -33,7 +33,7 @@
         }
       ],
       "revision": 134553
-    },
+    }
   ],
   "manifest_version": 2
 }