Enabled 'add_cuda' for bool and fixed alpha scalar bug (#23044)
Summary:
Enabled 'add_cuda' for bool
Tested via unit tests
Fixed https://github.com/pytorch/pytorch/issues/22431 #22430
Pull Request resolved: https://github.com/pytorch/pytorch/pull/23044
Differential Revision: D16368095
Pulled By: izdeby
fbshipit-source-id: 033d28095ff1c5df4078905c52782cf4cf9ed6b0
