Use NNPACK for strided convolutions. (#29084)
Summary:
Use NNPACK for strided convolutions.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/29084
Differential Revision: D18286473
Pulled By: AshkanAliabadi
fbshipit-source-id: accdfafa2c247f2750208a7af84c9e2c0374920b
