fixes tool colors (#9129)

code/modules/mob/living/carbon/human/update_icons.dm

@@ -119,6 +119,12 @@ There are several things that need to be remembered:
 #define GET_BODY_TYPE (cached_bodytype || (cached_bodytype = species.get_bodytype()))
 #define GET_TAIL_LAYER (dir == NORTH ? TAIL_NORTH_LAYER : TAIL_SOUTH_LAYER)
 
+/proc/overlay_image(icon,icon_state,color,flags)
+	var/image/ret = image(icon,icon_state)
+	ret.color = color
+	ret.appearance_flags = flags
+	return ret
+
 /mob/living/carbon/human
 	var/list/overlays_raw[TOTAL_LAYERS] // Our set of "raw" overlays that can be modified, but cannot be directly applied to the mob without preprocessing.
 	var/previous_damage_appearance // store what the body last looked like, so we only have to update it if something changed

code/modules/mob/living/silicon/robot/robot_items.dm

@@ -380,13 +380,15 @@
 /obj/item/screwdriver/robotic
 	icon = 'icons/obj/robot_items.dmi'
 	icon_state = "screwdriver"
-	random_color = FALSE
+	build_from_parts = FALSE
 
 /obj/item/device/multitool/robotic
 	icon = 'icons/obj/robot_items.dmi'
 
 /obj/item/wirecutters/robotic
 	icon = 'icons/obj/robot_items.dmi'
+	icon_state = "wirecutters"
+	build_from_parts = FALSE
 
 /obj/item/weldingtool/robotic
 	icon = 'icons/obj/robot_items.dmi'