Update cuDNN to v2
Update cuDNN to v2

The most recent public release of cuDNN
facebook/fbcunn,yxdunc/fbcunn,facebook/fbcunn,Moodstocks/fbcunn,Snazz2001/fbcunn,RTBHOUSE/fbcunn,facebook/fbcunn,wangg12/fbcunn,RTBHOUSE/fbcunn,linearregression/fbcunn,ndronen/fbcunn,wangg12/fbcunn,linearregression/fbcunn,u20024804/fbcunn,Moodstocks/fbcunn,Snazz2001/fbcunn,u20024804/fbcunn,u20024804/fbcunn,ndronen/fbcunn,Snazz2001/fbcunn,linearregression/fbcunn,wangg12/fbcunn,Moodstocks/fbcunn,yxdunc/fbcunn,ndronen/fbcunn,RTBHOUSE/fbcunn,yxdunc/fbcunn