fix different round behavior on CPU and GPU #16498 (#17443)
Summary:
xxtemp, colesbury, bhushan23, zou3519, convert gpu round behavior to half-to-even, consistent with torch cpu version and numpy. You feedback are welcomed.
See #16498
Pull Request resolved: https://github.com/pytorch/pytorch/pull/17443
Differential Revision: D14261786
Pulled By: VitalyFedyunin
fbshipit-source-id: 98156436b545d72769831a89e2775d43ad913ebc
