Update qiniu.rb
Update qiniu.rb

修复 401 Unauthorized => Qiniu::HTTP.post('http://up.qiniu.com/') 错误
CocaColaCat/carrierwave-qiniu,anehing/carrierwave-qiniu,huobazi/carrierwave-qiniu,huobazi/carrierwave-qiniu,weizhiwu/carrierwave-qiniu,lazing/carrierwave-qiniu