Update selfrando commit in hardened series

The selfrando commit we use in the hardened series is pretty old. The patch for legacy/trac#20683 (moved) is much newer and the code should be more robust. We should update it trying e.g. current master.

added GeorgKoppen201704 in Legacy / Trac TorBrowserTeam201704 in Legacy / Trac component::applications/tor browser in Legacy / Trac owner::tbb-team in Legacy / Trac priority::medium in Legacy / Trac resolution::wontfix in Legacy / Trac severity::normal in Legacy / Trac status::closed in Legacy / Trac type::enhancement in Legacy / Trac labels

Trac:
Resolution: N/A to wontfix
Status: new to closed

closed

moved from legacy/trac#21867 (moved)

added Feature label and removed 1 deleted label

removed 1 deleted label