Method handleSignal

tests/catch.hpp:8536–8547

    };

    void FatalConditionHandler::handleSignal( int sig ) {
        char const * name = "<unknown signal>";
        for (auto const& def : signalDefs) {
            if (sig == def.id) {
                name = def.name;
                break;
            }
        }
        reset();
        reportFatal(name);
        raise( sig );
    }

    FatalConditionHandler::FatalConditionHandler() {
        isSet = true;