insert default parameters in binary cross entropy with logits (#21336)
Summary:
I inserted default weight and reduction params in binary_cross_entropy_with_logits function . These default params exist in python and binary_cross_entropy function in cpp.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/21336
Differential Revision: D15628917
Pulled By: ezyang
fbshipit-source-id: 38e5f53851125238842df1bd71cb6149c8603be1
