Clean up files and add entries to charmap

ld_script.txt

@@ -242,7 +242,7 @@ SECTIONS {
         asm/battle_frontier_2.o(.text);
         src/item_menu.o(.text);
         src/list_menu.o(.text);
-        src/unk_text_util.o(.text);
+        src/dynamic_placeholder_text_util.o(.text);
         src/save_location.o(.text);
         src/item_icon.o(.text);
         asm/party_menu.o(.text);