New comment by mnabid on void-packages repository

https://github.com/void-linux/void-packages/pull/20586#issuecomment-608363230

Comment:
Travis throws this error: 
```
srcpkgs/baobab/template:11: use SPDX id for 'GFDL-1.1' license or see Manual.md
The command "common/travis/xlint.sh" failed and exited with 1 during .
```
Does Travis not have GFDL-1.1 in its `license.lst` ?