[clone_app.py] missing s for filters function

[iblislin]

Consider the following code in clone_app.py

I think the filter in the if statement should be filters.

        elif key in ('shows', 'lists', 'filter', 'updates'):
            showpath = os.path.join(path, key)
            if not os.path.isdir(showpath):
                os.makedirs(showpath)
            for func_name, func in doc[key].iteritems():
                filename = os.path.join(showpath, '%s.js' % func_name)
                util.write(filename, func)
                logger.warning(
                    "clone show or list not in manifest: %s" % filename)