pytorch

55fc3778 - Check if QNNPACK is supported before set (#26935)

Check if QNNPACK is supported before set (#26935) Summary: ghstack-source-id: 0e873a56a879cab30b7fa1778e65d9cb89474f05 Pull Request resolved: https://github.com/pytorch/pytorch/pull/26935 Pull Request resolved: https://github.com/pytorch/pytorch/pull/26936 Differential Revision: D17617452 Pulled By: IvanKobzarev fbshipit-source-id: 4dbcdc55044dd2050b28062baa8b58c8387a1e4e