[Torch] Support aten::hardswish_

[zhiqwang]

Thanks for participating in the TVM community! We use https://discuss.tvm.ai for any general usage questions and discussions. The issue tracker is used for actionable items such as feature proposals discussion, roadmaps, and bug tracking. You are always welcomed to post on the forum first :)

Hi TVM teams,

The new released nn.Hardswish activation ops in PyTorch 1.7 are widely used in MobileNetV3 and YOLO V5. I want to know is there any plan to support this operator?

[zhiics]

The current PyTorch version in our CI is 1.4. @masahi could you please comment? I remember you had some plans for 1.6/7.

[masahi]

@zhiics We've upgraded to 1.7 recently #6828

@zhiqwang We can certainly support hardswish.

[zhiics]

@masahi Sorry. I missed that. Cool