update for openttd
This update fixes the following security issue with openttd:
- add patch 60.patch:
Aircraft crashing near the map's border due to a lack of airports
could trigger a crash [CVE-2013-6411] [FS#5820] (bnc#853041)
- Submitted by Marcel Gmür (ammler)
Fixed bugs
bnc#853041
VUL-0: CVE-2013-6411: openttd: Denial of service (server) using forcefully crashed aircrafts