pytorch

a3caa719 - fix #45552 - adding add_done_callback(fn) to torch.futures.Future (#45675)

fix #45552 - adding add_done_callback(fn) to torch.futures.Future (#45675) Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/45675 Test Plan: Imported from OSS Reviewed By: glaringlee Differential Revision: D24055353 Pulled By: bdhirsh fbshipit-source-id: 9233c8e17acc878f0fecbe740a4397fb55cf722f