Comment wave5 garbage data (pret#474)

Also mention songs that use which wave5 data

audio/wave_samples.asm

@@ -31,3 +31,9 @@
 
 ; duty 5 reads from sfx data
 .wave5
+; in audio 1: (used by audio/music/lavender.asm)
+;	dn  2,  1, 14,  2,  3,  3,  2,  8, 14,  1,  2,  2, 15, 15, 14, 10,  1,  0,  1,  4, 13, 12,  1,  0, 14,  3,  4,  1,  5,  1,  7,  3
+; in audio 2:
+;	dn 14, 12,  0,  2,  2,  0,  9,  1,  0,  7, 12,  0,  2,  0,  8,  1,  0,  7, 13,  0,  2,  0,  9,  1,  0,  7, 12,  0,  2, 12, 10,  1
+; in audio 3: (used by audio/music/pokemontower.asm)
+;	dn  2,  1, 14,  2,  3,  3,  2,  8, 14,  1,  2,  2, 15, 15,  2,  2, 15,  7,  2,  4,  2,  2, 15,  7,  3,  4,  2,  4, 15,  7,  4,  4