fix: fill a launcher name listed under another

RetroPie lists KS 1.3 as kick34005.A500, and its fs-uae launcher
passes $biosdir/kick13.rom. The listed copy settles fs-uae's entry by
content, so the launcher layer never offered it, and kick13.rom
reached the pack only as a copy of UAE4All2's amiga/kick13.rom: the
x86 boards, without UAE4All2, lost it. An entry the list settles under
another name now answers the launcher's place by its own name.

scripts/verify.py

@@ -627,6 +627,9 @@ def find_undeclared_files(
                 )
                 if verdict == "settled":
                     seen_files.add(seen_key)
+                    if (launcher_layer and not f.get("unsourceable") and not save_root
+                            and f.get("root") not in OUTER_ROOTS and not f.get("unplaced")):
+                        launcher_layer.declared_elsewhere(emu_name, is_standalone, f)
                     # Answered by the platform's own declaration, which its
                     # report covers: the set it belongs to is spoken for.
                     set_records.append((set_keys((emu_name, is_standalone), f), f, True, None))