Fix Arc Cannon not hurting npc_gunship and npc_pilot_elite

[NachosChipeados]

Fixes #842 . I only NOW realized i could just pr it directly lol

[GeckoEidechse]

cc @Dinorush @GalacticMoblin @ASpoonPlaysGames @Masterliberty @Zanieon

[Zanieon]

I'm fine with this, @NachosChipeados might wanna do another PR to also include npc_gunship as they are also missing from that array, and they are still a possibility for modding in the game.

[NachosChipeados]

Question: does npc_pilot_elite_assassin work? Its not derived from npc_pilot_elite or npc_soldier so theoretically the Arc Cannon wouldn't be able to hit them, but i can't get them to spawn so i can't test it

[Zanieon]

Question: does npc_pilot_elite_assassin work? Its not derived from npc_pilot_elite or npc_soldier so theoretically the Arc Cannon wouldn't be able to hit them, but i can't get them to spawn so i can't test it

It works becase what you need to care in this is the BaseClass of the aisetting definition, not the name of the setting itself, npc_pilot_elite_assassin still uses npc_pilot_elite as BaseClass, so it will be counted.

[Zanieon]

Simple additions, i see that you decided to include my suggestion, so all good for me.

[GeckoEidechse]

Given the simple nature of the change I'm fine with merging it without any further testing as it can easily be reverted should something turn out to not work out as intended ^^