Dead links from projects/obfsproxy.html.en to flashproxy bundles

Seems like that the internal website git links (<version-torobfsbundlealpha> etc.) changed to 2.4.9, and that broke all the links to the bundles in https://www.torproject.org/projects/obfsproxy.html.en .

Maybe we should hardcode the links to those bundles to 2.4.7 for now, till they get into the regular bundle release schedule?