Add missing power storage nodes crafts

nodes.lua

@@ -39,6 +39,20 @@ minetest.register_craft({
 	}
 })
 
+definition={
+	description=S("Advanced Machine Block"),
+	tiles={"industrialtest_advanced_machine_block.png"}
+}
+if industrialtest.mtgAvailable then
+	definition.sounds=default.node_sound_metal_defaults()
+	definition.groups={cracky=2,level=2}
+elseif industrialtest.mclAvailable then
+	definition.sounds=mcl_sounds.node_sound_metal_defaults()
+	definition._mcl_blast_resistance=7
+	definition._mcl_hardness=5
+end
+minetest.register_node("industrialtest:advanced_machine_block",definition)
+
 definition={
 	description=S("Rubber Wood"),
 	tiles={