New comment by jirib on void-packages repository

https://github.com/void-linux/void-packages/issues/18827#issuecomment-582482562

Comment:
```
# xbps-alternatives -s tar
tar-1.32_2: applying 'tar' alternatives group
Creating 'tar' alternatives group symlink: tar -> /usr/bin/gtar
```

yep, it was not set. thx.