[gardening] Mark RawDatagramSocket/any_A01_t02 co19 test flaky

TBR=kustermann@google.com

Bug: https://github.com/dart-lang/co19/issues/170
Change-Id: I55c1fa15c886f9e31203499a3fba8991938ddd36
Reviewed-on: https://dart-review.googlesource.com/c/80665
Reviewed-by: Vyacheslav Egorov <vegorov@google.com>
Reviewed-by: Martin Kustermann <kustermann@google.com>
Commit-Queue: Vyacheslav Egorov <vegorov@google.com>
diff --git a/tests/co19_2/co19_2-kernel.status b/tests/co19_2/co19_2-kernel.status
index c2c2e36..0223086 100644
--- a/tests/co19_2/co19_2-kernel.status
+++ b/tests/co19_2/co19_2-kernel.status
@@ -1,6 +1,7 @@
 # Copyright (c) 2018, 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.
+LibTest/io/RawDatagramSocket/any_A01_t02: Pass, Fail # Issue https://github.com/dart-lang/co19/issues/170
 
 [ $compiler == dartkp ]
 Language/Expressions/Instance_Creation/New/evaluation_t20: RuntimeError