add blank material files

bshift/pbr/barney.wad/+hand_lock/+hand_lock.mat

@@ -0,0 +1,8 @@
+
+{
+"for" "+0hand_lock"
+//"basecolor_map" "+0hand_lock.png"
+//"normal_map" "+0hand_lock_normal.png"
+//"metal_map" "+0hand_lock_metal.png"
+//"roughness_map" "+0hand_lock_roughness.png"
+}