[gardening] mark standalone_2/io/stdout_stderr_non_blocking_test as flaky

Issue: https://github.com/dart-lang/sdk/issues/35192
Change-Id: Ieb2e3b6d1dbb5577963cf3ef528c356d0dd7dd44
Reviewed-on: https://dart-review.googlesource.com/c/89144
Reviewed-by: Samir Jindel <sjindel@google.com>
Commit-Queue: Samir Jindel <sjindel@google.com>
Auto-Submit: Daco Harkes <dacoharkes@google.com>
diff --git a/tests/standalone_2/standalone_2_vm.status b/tests/standalone_2/standalone_2_vm.status
index 2a5f9e9..86edea0 100644
--- a/tests/standalone_2/standalone_2_vm.status
+++ b/tests/standalone_2/standalone_2_vm.status
@@ -73,6 +73,9 @@
 [ $arch == simdbc64 && $mode == debug && $checked ]
 io/web_socket_test: Pass, RuntimeError # Issue 26814.
 
+[ $arch == x64 && $compiler == dartkb && $runtime == vm && $system == linux ]
+io/stdout_stderr_non_blocking_test: Pass, Timeout # Issue 35192
+
 [ $compiler != dart2analyzer && $system == windows ]
 io/platform_resolved_executable_test/06: RuntimeError # Issue 23641
 
@@ -84,6 +87,9 @@
 io/http_server_close_response_after_error_test: Pass, Timeout # Issue 28370: timeout.
 io/regress_7191_test: Pass, Timeout # Issue 28374: timeout.
 
+[ $runtime == dart_precompiled && $system == linux && ($arch == simarm || $arch == simarm64) ]
+io/stdout_stderr_non_blocking_test: Pass, Timeout # Issue 35192
+
 [ $runtime == vm && !$checked && !$strong ]
 io/file_constructor_test: RuntimeError