Add finversion.sh for OpenTTD compilefarm

git-svn-id: svn://tron.homeunix.org/simutrans/simutrans/trunk@7361 8aca7d54-2c30-db11-9de9-000461428c89
use older conversion function

git-svn-id: svn://tron.homeunix.org/simutrans/simutrans/trunk@7362 8aca7d54-2c30-db11-9de9-000461428c89
use wide default windows function

git-svn-id: svn://tron.homeunix.org/simutrans/simutrans/trunk@7363 8aca7d54-2c30-db11-9de9-000461428c89