[qq] fix title for some videos
[qq] fix title for some videos

e.g. http://v.qq.com/cover/p/ps6mnfqyrfo7es3.html?vid=q0181hpdvo5
hope this won't break others, or we should try to recognize the URL
pattern (maybe apply to only URLs with "/cover/")?

xyuanmu/you-get,smart-techs/you-get,lilydjwg/you-get,cnbeining/you-get,smart-techs/you-get,linhua55/you-get,qzane/you-get,qzane/you-get,xyuanmu/you-get,zmwangx/you-get,lilydjwg/you-get,zmwangx/you-get,linhua55/you-get,cnbeining/you-get