Adds inteq survival boxes. (#3607)

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## About The Pull Request
Contents:
- inteq balaclava
- radio
- adv. o2 tank
- medipen

Every inteq role gets this.
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## Why It's Good For The Game
Balaclavas are, according to their desc, used to conceal member
identities. Kinda weird that most members don't get them!
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## Changelog

:cl:
add: Added an inteq survival box.
/:cl:

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code/game/objects/items/storage/boxes.dm

@@ -182,6 +182,10 @@
 	mask_type = /obj/item/clothing/mask/balaclava
 	internal_type = /obj/item/tank/internals/emergency_oxygen/double
 
+/obj/item/storage/box/survival/inteq
+	mask_type = /obj/item/clothing/mask/balaclava/inteq
+	internal_type = /obj/item/tank/internals/emergency_oxygen/engi
+
 /obj/item/storage/box/survival/frontier
 	mask_type = null // we spawn in gas masks in frontiersmen bags alongside this, so it isn't nessary
 	internal_type = /obj/item/tank/internals/emergency_oxygen //frontiersmen dont

code/modules/clothing/outfits/factions/inteq.dm

@@ -3,7 +3,7 @@
 	faction_icon = "bg_inteq"
 
 	uniform = /obj/item/clothing/under/syndicate/inteq
-	box = /obj/item/storage/box/survival
+	box = /obj/item/storage/box/survival/inteq
 
 	backpack = /obj/item/storage/backpack
 	satchel = /obj/item/storage/backpack/satchel