Fix equation for gru op (#7274)
Fix equation for gru op (#7274)


tensor-tang/Paddle,lcy-seso/Paddle,pkuyym/Paddle,lcy-seso/Paddle,tensor-tang/Paddle,lcy-seso/Paddle,chengduoZH/Paddle,reyoung/Paddle,PaddlePaddle/Paddle,jacquesqiao/Paddle,jacquesqiao/Paddle,pkuyym/Paddle,pkuyym/Paddle,jacquesqiao/Paddle,Canpio/Paddle,lcy-seso/Paddle,chengduoZH/Paddle,QiJune/Paddle,PaddlePaddle/Paddle,jacquesqiao/Paddle,putcn/Paddle,reyoung/Paddle,putcn/Paddle,luotao1/Paddle,lcy-seso/Paddle,Canpio/Paddle,putcn/Paddle,baidu/Paddle,tensor-tang/Paddle,baidu/Paddle,putcn/Paddle,putcn/Paddle,luotao1/Paddle,PaddlePaddle/Paddle,jacquesqiao/Paddle,pkuyym/Paddle,Canpio/Paddle,PaddlePaddle/Paddle,luotao1/Paddle,QiJune/Paddle,pkuyym/Paddle,QiJune/Paddle,chengduoZH/Paddle,baidu/Paddle,luotao1/Paddle,luotao1/Paddle,lcy-seso/Paddle,baidu/Paddle,putcn/Paddle,reyoung/Paddle,Canpio/Paddle,reyoung/Paddle,Canpio/Paddle,QiJune/Paddle,QiJune/Paddle,luotao1/Paddle,PaddlePaddle/Paddle,luotao1/Paddle,pkuyym/Paddle,Canpio/Paddle,chengduoZH/Paddle,QiJune/Paddle,reyoung/Paddle,baidu/Paddle,chengduoZH/Paddle,PaddlePaddle/Paddle,Canpio/Paddle,PaddlePaddle/Paddle,tensor-tang/Paddle,reyoung/Paddle,Canpio/Paddle,jacquesqiao/Paddle,tensor-tang/Paddle