Fix Concat Dimension Bug (#22088)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/22088
This diff is similar to D14163001. We need to handle the edge case when add_axis=1.
Reviewed By: jspark1105
Differential Revision: D15949003
fbshipit-source-id: 328d1e07b78b69bde81eee78c9ff5a8fb81f629b
