Build option USE_NUMA should only show up on Linux. (#23673)
Summary:
(intentionally left blank)
Pull Request resolved: https://github.com/pytorch/pytorch/pull/23673
Differential Revision: D16627453
Pulled By: vincentqb
fbshipit-source-id: df62f1b26901bec6369b5589b98124165f40e6f1
