New comment by paper42 on void-packages repository

https://github.com/void-linux/void-packages/pull/31463#issuecomment-860253204

Comment:
I think the xlint warning can be ignored in this case:
```
srcpkgs/uwsgi/template:9: use SPDX id for 'GPL-2.0-linking-exception' license or see Manual.md
```
spdx doesn't have GPL-2.0-linking-exception, but has GPL-3.0-linking-exception. or should it be a custom license?