fix: name rs232.rom as openmsx's code names it

AHashScanLabelNamesNoOtherDump read openmsx-libretro's rs232.rom as
fmsx's name for another dump: share/extensions/rs232.xml:18-22 names
it, so it joins CODE_NAMED. test_standalone_links called unittest.main()
before the amiberry classes, which a direct run skipped.

tests/test_audit_regressions.py

@@ -6362,6 +6362,8 @@ class AHashScanLabelNamesNoOtherDump(unittest.TestCase):
             "share/machines/ColecoVision_SGM.xml:56 names it, tried beside the machine XML",
         ("openmsx", "fmpac.rom"):
             "share/machines/Boosted_MSX2_EN.xml:83 names it, tried beside the machine XML",
+        ("openmsx-libretro", "rs232.rom"):
+            "share/extensions/rs232.xml:18-22 names it, tried beside the extension XML",
     }
 
     @staticmethod

tests/test_standalone_links.py

@@ -540,10 +540,6 @@ class Scrapers(unittest.TestCase):
         self.assertIn("Dreamcast.BiosPath", records[0]["passes_to"])
 
 
-if __name__ == "__main__":
-    unittest.main()
-
-
 class OpenmsxOnEachPlatform(unittest.TestCase):
     """openMSX finds system ROMs by SHA1 in share/systemroms below its user
     directory and in every filepool entry. RetroBat sets OPENMSX_HOME to
@@ -775,3 +771,7 @@ class AmiberryBuildEachPlatformShips(unittest.TestCase):
                     self.assertEqual(entry["standalone_path"], entry["path"][len("kickstarts/"):])
                 else:
                     self.assertEqual(entry.get("unplaced"), "outside_bios_folder")
+
+
+if __name__ == "__main__":
+    unittest.main()