Update status for html/wheelevent_test

dart/tests/html/html.status

Index: dart/tests/html/html.status
diff --git a/dart/tests/html/html.status b/dart/tests/html/html.status
index 068dea8b452611895df83da011b245ffccbc589d..29d55f0c42bc6e6d9db4578eb1aa8d41e73657bb 100644
--- a/dart/tests/html/html.status
+++ b/dart/tests/html/html.status
@@ -384,3 +384,6 @@ js_interop_3_test: Skip            # Test cannot run under CSP restrictions (tim
 js_test: Skip                      # Test cannot run under CSP restrictions (times out).
 postmessage_structured_test: Skip  # Test cannot run under CSP restrictions (times out).
 safe_dom_test: Skip                # Test cannot run under CSP restrictions (times out).
+
+[ $compiler == dart2js && $runtime == drt ]
+wheelevent_test: Fail # http://dartbug.com/12958