Selective meta programming preparation for prim ops (#43540)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/43540
selected_mobile_ops.h is generated at BUCK build time, which contains the whitelist of root operators. It's used for templated selective build when XPLAT_MOBILE_BUILD is defined.
ghstack-source-id: 111014372
Test Plan: CI and BSB
Reviewed By: ljk53
Differential Revision: D22618309
fbshipit-source-id: ddf813904892f99c3f4ae0cd14ce8b27727be5a2
