move new_zeros to core from THP (#26511)
Summary:
Fix for issue https://github.com/pytorch/pytorch/issues/25831
ezyang can you please have a look?
Pull Request resolved: https://github.com/pytorch/pytorch/pull/26511
Differential Revision: D17763037
Pulled By: ezyang
fbshipit-source-id: 3596c01c4ab421e7785d6055cc813806f840a5c7
