New comment by tibequadorian on void-packages repository

https://github.com/void-linux/void-packages/pull/25106#issuecomment-699683562

Comment:
Obtaining the key is described at https://support.torproject.org/tbb/how-to-verify-signature
So the key in `$FILESDIR` can be reproduced like this:
```
$ curl -s https://openpgpkey.torproject.org/.well-known/openpgpkey/torproject.org/hu/kounek7zrdx745qydx6p59t9mqjpuhdf | gpg2 --homedir /tmp/.gnupg --import -
$ gpg2 --homedir /tmp/.gnupg -a --export '4E2C6E8793298290' > tor-browser-developers.asc
```