Name inference rule for masked select (#25566)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/25566
masked_select returns a tensor with None names. However, it broadcasts
its inputs so we need to perform a check that they are broadcastable.
Test Plan: - new tests [namedtensor ci]
Differential Revision: D17159071
Pulled By: zou3519
fbshipit-source-id: ad201f3f73bc54163ede1ba3d906d2409ebef475
