pytorch

35b950ea - [package] properly handle case where we are re-packaging mocked modules (#61434)

[package] properly handle case where we are re-packaging mocked modules (#61434) Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/61434 Mocking is the only time we introduce a "special" module to a torch.package of our own creation. This interacts poorly with re-packaging, since if we treat `_mock` as a regular module and try to package it normally we will produce a broken package. This PR teaches PackageExporter to recognize `_mock` modules and treat them specially during the dependency walking process, thus avoiding the issue. Test Plan: Imported from OSS Reviewed By: jdonald, Lilyjjo Differential Revision: D29638283 Pulled By: suo fbshipit-source-id: 37a7ffa34da8bb665f679fbd72aa3d71154b2209