Give battle_anim files appropriate names

sym_common.txt

@@ -34,7 +34,7 @@
 	.include "save.o"
 	.include "battle_tower.o"
 	.include "intro.o"
-	.include "battle_anim_8170478.o"
+	.include "battle_anim_special.o"
 	.include "battle_factory_screen.o"
 	.include "apprentice.o"