mark as flaky not failing

pkg/pkg.status

 # Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 # for details. All rights reserved. Use of this source code is governed by a
 # BSD-style license that can be found in the LICENSE file.
 
 # Don't run any test-like files that show up in packages directories. It
 # shouldn't be necessary to run "pub install" in these packages, but if you do
 # it shouldn't break the tests.
 */packages/*/*: Skip
 */*/packages/*/*: Skip
 */*/*/packages/*/*: Skip
@@ skipping 213 matching lines @@
 
 [ $compiler == dart2js || $compiler == dart2dart ]
 source_maps/test/vlq_test: RuntimeError # A VLQ test checks for large numbers that
                                 # overflow in JS (numbers slightly larger than
                                 # 32 bits where we do bitwise operations).
 
 [ $runtime == opera && $compiler == dart2js ]
 intl/test/find_default_locale_browser_test: Fail
 intl/test/date_time_format_http_request_test: Skip # Timeout.
 
-[ $runtime == safarimobilesim ]
-polymer/test/bind_mdv_test: RuntimeError # Issue 20929
-
 [ $ie ]
 polymer/test/noscript_test: RuntimeError, Pass # Issue 13260
 intl/test/date_time_format_http_request_test: Fail # Issue 8983
 polymer_expressions/test/syntax_test: Fail, Timeout, Pass # Issue 19138
 observe/test/list_path_observer_test: RuntimeError, Pass # Issue 20849
 polymer/test/template_attr_template_test: RuntimeError # Issue 20897
 
 [ $runtime == ie10 ]
 analyzer/test/generated/java_core_test: Pass, Timeout # Issue 19747
 polymer/e2e_test/*: Pass, RuntimeError # Issue 19265
@@ skipping 235 matching lines @@
 third_party/angular_tests/browser_test/change_detection/dirty_checking_change_detector: Skip # Issue 17152
 
 [ $use_repository_packages ]
 analyzer/test/*: PubGetError
 
 [ $runtime == drt ]
 http/test/html/client_test: Skip # Issue 18566
 
 [ $system == windows ]
 analysis_server/test/integration/search/get_type_hierarchy_test: Pass, Fail # Issue 20436