Changed the way Orc Watch towers become Armed Watch towers where they undergo a re-construction period like Human scout towers becoming Guard towers. The new updated unit is also a tad taller than the Watch tower and features some spikes coming out the top given I don't have a unique Orc tower to use. This likely breaks the current Orc Armed watch towers in the human missions which I haven't checked yet, so may need to go back there and re-fix.
