Improve FindMKLDNN.cmake to avoid binary compatibility issue in MKL-DNN (#23292)
Summary:
Illegal instruction is encountered in pre-built package in MKL-DNN. https://github.com/pytorch/pytorch/issues/23231
To avoid such binary compatibility issue, the HostOpts option in MKL-DNN is disabled in order to build MKL-DNN for generic arch.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/23292
Differential Revision: D16488773
Pulled By: soumith
fbshipit-source-id: 9e13c76fb9cb9338103cb767d7463c10891d294a
