.circleci: Add manywheel builds for python 3.8 (#34732)
Summary:
Not entirely sure why this wasn't here before but we definitely need to
test for this.
Closes https://github.com/pytorch/pytorch/issues/34727
Signed-off-by: Eli Uriegas <eliuriegas@fb.com>
Pull Request resolved: https://github.com/pytorch/pytorch/pull/34732
Differential Revision: D20480508
Pulled By: seemethere
fbshipit-source-id: 43bcff679ca35993f6bf1b10980acd7c86f780b1
