Update oops-tools to not show google cached site as referred from local sites.

The analyse-error-reports.py script currently checks if a page was referred from a local site by doing:

local_referer = ('launchpad.net' in referer or 'ubuntu.com' in referer)

But this causes the following problem when the referer is something like (google cached site):

http://72.14.235.104/search?q=cache:tnv3qOWtjyYJ:https://launchpad.net/distros/ubuntu/dapper

The report would then look like:

>26 NotFound: Object: <zope.app.publisher.browser.viewmeta.Resources object at
INSTANCE-ID>, name: u'user.gif'
> 0% from search bots, 96% referred from local sites
> 26 https://launchpad.net/@@/user.gif
> OOPS-270A381, OOPS-270A55, OOPS-270B11, OOPS-270B113, OOPS-270B17

When in fact those weren't referred from any launchpad.net or ubuntu.com site.