move m4a track definitions

sym_bss.txt

@@ -55,6 +55,7 @@
 	.include "src/ereader_helpers.o"
 	.include "src/faraway_island.o"
 	.include "src/m4a_1.o"
+	.include "data/sound_data.o"
 	.include "src/agb_flash.o"
 	.include "src/siirtc.o"
 	.include "*libgcc.a:dp-bit.o"