question: mkl-dnn upgrade for PyTorch

Hi Intel ideep team, thanks for the awesome works of integrating mkl-dnn with PyTorch.😃

I noticed that the `pytorch_dnnl` branch is used for such integration, while the latest commit shows the ideep leverages the `1.5` version of mkl-dnn.

```bash
$ cd /root/pytorch/third_party/ideep
$ git log
commit 938cc68897bb46b8d4b228966edd9e23e471cf3b (HEAD, origin/pytorch_dnnl)
Author: pinzhenx
Date: Tue Jun 16 18:54:21 2020 +0000

bump onednn to v1.5
```

Our application runs PyTorch on Intel CPU architecture, and we relies on mkl-dnn to gain better performances.

We want to know when will ideep upgrades mkl-dnn for PyToch, do you have a timetable for doing so?