libstdc++.so.6 is included twice in tor-browser
libstdc++.so.6 is included twice in tor-browser:
- tor-browser/Browser/TorBrowser/Tor/libstdc++/libstdc++.so.6
- tor-browser/Browser/libstdc++/libstdc++.so.6
The second one is supposed to be included in mullvad-browser only, but
there is a typo in projects/firefox/build:
[% IF !c("var/torbrowser") -%]
(var/torbrowser instead of var/tor-browser)