Hardsuit and Pickaxe Bugfixes (#9594)

code/modules/mining/mine_items.dm

@@ -68,6 +68,7 @@
 	var/digspeed //moving the delay to an item var so R&D can make improved picks. --NEO
 	origin_tech = list(TECH_MATERIAL = 1, TECH_ENGINEERING = 1)
 	attack_verb = list("hit", "pierced", "sliced", "attacked")
+	hitsound = 'sound/weapons/rapidslice.ogg'
 	var/drill_sound = "pickaxe"
 	var/drill_verb = "excavating"
 	var/autodrill = 0 //pickaxes must be manually swung to mine, drills can mine rocks via bump