Update build targets to include generated enum_tag.cpp
Differential Revision: [D37131776](https://our.internmc.facebook.com/intern/diff/D37131776/)
**NOTE FOR REVIEWERS**: This PR has internal Facebook specific changes or comments, please review them on [Phabricator](https://our.internmc.facebook.com/intern/diff/D37131776/)!
Pull Request resolved: https://github.com/pytorch/pytorch/pull/79668
Approved by: https://github.com/bdhirsh
