Bug 1420511: Update meta data for maximise window commands wdspec tests. r=ato

MozReview-Commit-ID: AZ55yVpbTit

--HG--
extra : rebase_source : 78556be24e61a84bf578f551b0b7a64eb5138fbb

testing/web-platform/meta/webdriver/tests/contexts/maximize_window.py.ini

@@ -1,3 +1,7 @@
 [maximize_window.py]
   type: wdspec
-  disabled: if (os == "linux"): https://bugzilla.mozilla.org/show_bug.cgi?id=1399633
+  disabled:
+    if os == "linux": https://bugzilla.mozilla.org/show_bug.cgi?id=1399633
+  [maximize_window.py::test_handle_prompt_accept]
+    expected: FAIL
+