[packaging] Fix search in squeeze cubicweb-documentation package (closes #2558496)
Work around broken combination of jquery 1.4 and sphinx 0.6 in squeeze by
patching up doctools.js.
# -*- coding: utf-8 -*-
# copyright %(year)s %(author)s, all rights reserved.
# contact %(author-web-site)s -- mailto:%(author-email)s
#
%(long-license)s
"""%(distname)s entity's classes"""