Ported libmks4agb from pokeruby (#12)

* Port agb_flash from pokeruby

* use ramscrgen

* formatting

* delete ewram_syms.txt and iwram_syms.txt

* Finish port of agb_flash

* Ported libmks4agb from pokeruby

* Reordered declarations to match pokeruby

asm/option_menu.s

@@ -1101,7 +1101,7 @@ sub_80BADD8: @ 80BADD8
 	movs r4, 0x1
 	eors r5, r4
 	adds r0, r5, 0
-	bl sub_82E1810
+	bl SetPokemonCryStereo
 	ldr r0, =gUnknown_02039B48
 	strb r4, [r0]
 _080BADF8: