www-client/torbrowser-launcher: update LICENSE

Package-Manager: portage-2.2.8-r2
www-client/torbrowser: Tor Browser 4.0 is released

https://blog.torproject.org/blog/tor-browser-40-released

Package-Manager: portage-2.2.8-r2
www-client/torbrowser-launcher: version bump

Package-Manager: portage-2.2.8-r2