package/tor: security bump version to 0.4.7.8
Fixes CVE-2022-33903.
Release notes:
https://raw.githubusercontent.com/torproject/tor/release-0.4.7/ReleaseNotes
Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>