disable clang-tidy modernize-trailing-return (#37888)
Summary:
too much noise from this warning
![image](https://user-images.githubusercontent.com/5086322/81123764-b6e15900-8ee8-11ea-8f2f-49d69ddde25d.png)
Pull Request resolved: https://github.com/pytorch/pytorch/pull/37888
Differential Revision: D21415338
Pulled By: Krovatkin
fbshipit-source-id: 8d6f1be11d8419fa54a18e167929100401da439a