add blank material files

valve/pbr/models/cindergibs_green.mdl/cindergibs_green.mdl.mat

@@ -0,0 +1,16 @@
+
+{
+"for" "#models/cindergibs_green/brokencinder.mdl"
+//"basecolor_map" "brokencinder.png"
+//"normal_map" "brokencinder_normal.png"
+//"metal_map" "brokencinder_metal.png"
+//"roughness_map" "brokencinder_roughness.png"
+}
+
+{
+"for" "#models/cindergibs_green/cinder.mdl"
+//"basecolor_map" "cinder.png"
+//"normal_map" "cinder_normal.png"
+//"metal_map" "cinder_metal.png"
+//"roughness_map" "cinder_roughness.png"
+}