gh-127146: Emscripten: Skip test_url2pathname_resolve_host

It's failing because `gethostbyname_r()` is returning an incorrect
ip address for `localhost`. Will be resolved by upstream PR:
emscripten-core/emscripten#24593

Author: hoodmane

Lib/test/test_urllib.py

@@ -1569,6 +1569,7 @@ def test_url2pathname_require_scheme_errors(self):
                     urllib.request.url2pathname,
                     url, require_scheme=True)
 
+    @unittest.skipIf(support.is_emscripten, "Fixed by https://github.com/emscripten-core/emscripten/pull/24593")
     def test_url2pathname_resolve_host(self):
         fn = urllib.request.url2pathname
         sep = os.path.sep