XL armor additions

Pursuant to discussion with KA101 in
https://github.com/CleverRaven/Cataclysm-DDA/pull/9669#comments, have
added XL versions leather and boiled leather armour, fur armour, fur
coat, scrap suit, survivor winter armour and hood, and survivor fire
armour and hood, and AEP suit.

Have also added a new XL harness item.

Will have a go at doing the recipes tomorrow probably.