Created by: wzzju
Add fused_batch_norm_act and fused_batch_norm_act_grad ops.
fused_batch_norm_act
fused_batch_norm_act_grad
Fuse the forward and backward of batch_norm and relu by using the fuse_bn_act_pass.
batch_norm
relu
fuse_bn_act_pass
Before the fusion:
After the fusion:
