Fix Travis grep script to use PCRE to actually match things (#47065)

Several of the greps were missing the `-P` switch which caused them to 
fail to match things. The EOL grep also wasn't working right so I 
replaced it with the one I added to TGMC.

code/game/objects/structures/crates_lockers/closets/secure/hydroponics.dm

@@ -10,4 +10,4 @@
 	new /obj/item/radio/headset/headset_srv(src)
 	new /obj/item/cultivator(src)
 	new /obj/item/hatchet(src)
-	new /obj/item/storage/box/disks_plantgene(src)
+	new /obj/item/storage/box/disks_plantgene(src)

code/game/objects/structures/crates_lockers/closets/secure/secure_closets.dm

@@ -6,4 +6,4 @@
 	max_integrity = 250
 	armor = list("melee" = 30, "bullet" = 50, "laser" = 50, "energy" = 100, "bomb" = 0, "bio" = 0, "rad" = 0, "fire" = 80, "acid" = 80)
 	secure = TRUE
-	damage_deflection = 20
+	damage_deflection = 20

code/game/objects/structures/crates_lockers/crates/critter.dm

@@ -45,4 +45,4 @@
 	if(tank)
 		return tank.return_analyzable_air()
 	else
-		return null
+		return null