Make harbinger portal summons friendly to its own summons

[CalliopeSoups]

Confusing title, but the critters that spawn from the harbinger wraith's portal (brullbars etc) see the wraith's own summons (voidhound etc) as enemies and attack them. Given how as the harbinger you're spawning these summons to PROTECT the portal, I find this kinda strange. Especially with brullbars, one hit on a wraith summon will bleed them to death. At least with gunbots, it makes sense that getting in the line of fire would hurt you.