pytorch

d74b11ce - add extra info for the auto gen sum ops

add extra info for the auto gen sum ops Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/17934 Reviewed By: iroot900 Differential Revision: D14418689 fbshipit-source-id: 9e11e461001467f0000ea7c355d5b0f0d738fa85