[gardening] Mark co19 LibTest/io/RawDatagramSocket/any_A01_t03 flaky

TBR=kustermann@google.com

Change-Id: Ie4fa7b875989ea31370c028d07e4ca5c9be0b310
Reviewed-on: https://dart-review.googlesource.com/c/81364
Reviewed-by: Vyacheslav Egorov <vegorov@google.com>
Commit-Queue: Vyacheslav Egorov <vegorov@google.com>
Auto-Submit: Vyacheslav Egorov <vegorov@google.com>
diff --git a/tests/co19_2/co19_2-kernel.status b/tests/co19_2/co19_2-kernel.status
index c171017..8c374fc 100644
--- a/tests/co19_2/co19_2-kernel.status
+++ b/tests/co19_2/co19_2-kernel.status
@@ -3,6 +3,7 @@
 # BSD-style license that can be found in the LICENSE file.
 LibTest/io/Link/rename_A02_t01: Pass, Fail # Issue https://github.com/dart-lang/co19/issues/174
 LibTest/io/RawDatagramSocket/any_A01_t02: Pass, Fail # Issue https://github.com/dart-lang/co19/issues/170
+LibTest/io/RawDatagramSocket/any_A01_t03: Pass, Fail # Issue https://github.com/dart-lang/co19/issues/170
 LibTest/io/RawDatagramSocket/asBroadcastStream_A01_t02: Pass, Fail # Issue https://github.com/dart-lang/co19/issues/170
 LibTest/io/RawDatagramSocket/distinct_A01_t05: Pass, Fail # Issue https://github.com/dart-lang/co19/issues/170
 LibTest/io/RawDatagramSocket/lastWhere_A01_t02: Pass, Fail # Issue https://github.com/dart-lang/co19/issues/170