[Gardening] Mark LibTest/io/RawDatagramSocket/timeout_A06_t01 as flaky

Change-Id: I8c853c188f14ac4e23cfd1fa16ff389ee0caae9a
Reviewed-on: https://dart-review.googlesource.com/c/81000
Reviewed-by: Martin Kustermann <kustermann@google.com>
Commit-Queue: Martin Kustermann <kustermann@google.com>
diff --git a/tests/co19_2/co19_2-kernel.status b/tests/co19_2/co19_2-kernel.status
index f257794..df6c4d0 100644
--- a/tests/co19_2/co19_2-kernel.status
+++ b/tests/co19_2/co19_2-kernel.status
@@ -5,6 +5,7 @@
 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/timeout_A02_t01: Pass, Fail # Issue https://github.com/dart-lang/co19/issues/170
+LibTest/io/RawDatagramSocket/timeout_A06_t01: Pass, Fail # Next roll might fix it (see https://github.com/dart-lang/co19/commit/8b2e2be5bc3bb9fec41efec8ac6fc777e231d915)
 
 [ $compiler == dartkp ]
 Language/Expressions/Instance_Creation/New/evaluation_t20: RuntimeError