Fix: DATA-2192
(PF/B3) Clockwork Goliath cannon not equippable as weapon/doesn't show attack/damage bonus

Add Proficiency

git-svn-id: svn+ssh://svn.code.sf.net/p/pcgen/code/Trunk@25573 ef53c05b-3124-4d59-ae7d-fe3273f42be7