[gardening] Mark service/simple_reload_test as Timeout for issue 35506

Issue: https://github.com/dart-lang/sdk/issues/35506
Change-Id: I1d82426bf7f2af2253f6197abb47468f8c2b9fd4
Reviewed-on: https://dart-review.googlesource.com/c/88443
Auto-Submit: Daco Harkes <dacoharkes@google.com>
Reviewed-by: Martin Kustermann <kustermann@google.com>
Commit-Queue: Martin Kustermann <kustermann@google.com>
diff --git a/runtime/observatory/tests/service/service_kernel.status b/runtime/observatory/tests/service/service_kernel.status
index 13a949b..8c902b1 100644
--- a/runtime/observatory/tests/service/service_kernel.status
+++ b/runtime/observatory/tests/service/service_kernel.status
@@ -36,7 +36,7 @@
 rewind_optimized_out_test: SkipByDesign # No incremental compiler available.
 rewind_test: SkipByDesign # No incremental compiler available.
 set_vm_name_rpc_test: RuntimeError # Issue 35512 VMOptions=--vm-name=Walter not recognized when running from snapshot.
-simple_reload_test: RuntimeError # Issue 35506
+simple_reload_test: RuntimeError, Timeout # Issue 35506
 unused_changes_in_last_reload_test: RuntimeError
 
 # Kernel works slightly different. There are kernel specific versions.