[gardening] Mark vm/dart_2/causal_stacks/async_throws_stack_lazy_non_symbolic_test as slow

These tests are slow and have flaky timeouts on dartkp-*-simarm and
dartkp-*-simarm64 bots. On dartkp-linux-release-simarm64 this test
recently becomes non-flaky timeout. Trying to increase the time
allocated to run those tests.

Change-Id: I1252b19fa7dbf7e592043a76c1402a2454793b16
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/184501
Reviewed-by: Ben Konyi <bkonyi@google.com>
Commit-Queue: Alexander Markov <alexmarkov@google.com>
diff --git a/runtime/tests/vm/vm.status b/runtime/tests/vm/vm.status
index 44a7888..964aafd 100644
--- a/runtime/tests/vm/vm.status
+++ b/runtime/tests/vm/vm.status
@@ -279,6 +279,10 @@
 dart_2/null_safety_autodetection_in_kernel_compiler_test: SkipByDesign # Test needs to run from source
 dart_2/snapshot_depfile_test: SkipByDesign # Test needs to run from source
 
+[ $compiler == dartkp && ($arch == simarm || $arch == simarm64) ]
+dart/causal_stacks/async_throws_stack_lazy_non_symbolic_test: Pass, Slow
+dart_2/causal_stacks/async_throws_stack_lazy_non_symbolic_test: Pass, Slow
+
 [ $compiler == dartkp && ($runtime == dart_precompiled || $runtime == vm) ]
 dart/redirection_type_shuffling_test: SkipByDesign # Includes dart:mirrors.
 dart/spawn_shutdown_test: SkipSlow