Give functions qualified names (#22206)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/22206
ghimport-source-id: d453219d907e048f24eb7f63c096b2c300307c83
Test Plan: Imported from OSS
Differential Revision: D15998762
Pulled By: suo
fbshipit-source-id: bc2b734f626ab07f97dc50ddf1b021e8b46de312
