Reinforced glass windshield for armored cars

Fits well with https://github.com/CleverRaven/Cataclysm-DDA/pull/2594
Had an idea to add deconstruction for reenforced glass in order to make this, but that would require additional tools - which construction doesn't support - and make 'secure' storage in science labs less secure. Just as easily can be found in pre-existing armored vehicles.