logrotate: workaround wget issue with wildcard ssl certificates

Fixes http://autobuild.buildroot.net/results/815/815e2759f4961805d768efe79f0d83d13b16e706/build-end.log



Certain wget versions dislike downloading from fedorahosted.org which
provides a SSL certificate for *.fedorahosted.org. Work around it by
instead downloading from www.fedorahosted.org instead.

Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>