Disable menulist-appearance-rtl.html on Win10 due to flakiness

BUG=674466
TBR=tkent@chromium.org

Review-Url: https://codereview.chromium.org/2572413003 .
Cr-Commit-Position: refs/heads/master@{#438799}

third_party/WebKit/LayoutTests/TestExpectations

@@ -2215,3 +2215,6 @@ crbug.com/673539 [ Linux ] css3/filters/effect-contrast-hw.html [ Pass Failure ]
 # Added 2016-12-14
 crbug.com/674048 [ Linux ] virtual/mojo-loading/http/tests/navigation/image-load-in-unload-handler.html [ Pass Timeout ]
 crbug.com/674396 [ Win ] compositing/reflections/nested-reflection-transition.html [ Pass Failure ]
+
+# Added 2016-12-15
+crbug.com/674466 [ Win10 ] fast/forms/select/menulist-appearance-rtl.html [ Pass Failure ]