Extract baserom calls from files

Extract calls from crt0.s, bard_music.s, battle_4.s

graphics/battle_interface/unk_battlebox.pal

@@ -0,0 +1,19 @@
+JASC-PAL
+0100
+16
+255 255 255
+255 255 255
+106 90 115
+0 0 0
+213 230 255
+189 205 238
+238 238 255
+106 172 197
+90 139 180
+123 197 205
+0 0 0
+0 0 0
+123 197 255
+0 0 139
+255 131 131
+164 0 0