Vaurca Self-Healing & ORGAN_ADV_ROBOT flag

Added a new flag for advanced synthetic organs. They're meant to be immune to EMP, mimmic most fleshy organ features, but lack the ability to heal themselves (while still accepting fleshy organ medicine).

This also fixes the Vaurca automatically healing themselves.

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

@@ -146,6 +146,10 @@
 			I.mechanize()
 
 	if(flags & IS_BUG)
+		for (var/datum/organ/external/E in H.organs)
+			if ((E.status & ORGAN_CUT_AWAY) || (E.status & ORGAN_DESTROYED))
+				continue
+			E.status |= ORGAN_ADV_ROBOT
 		for(var/datum/organ/internal/I in H.internal_organs)
 			I.mechanize()