Skip sample_extension_app_snapshot_test on opt-counter-threshold builders

Change-Id: Ia7ae955cc16995a1dd0917142e56309ec6b060ca
Reviewed-on: https://dart-review.googlesource.com/60964
Reviewed-by: Martin Kustermann <kustermann@google.com>
diff --git a/samples/samples.status b/samples/samples.status
index 3de2262..aeefd6e 100644
--- a/samples/samples.status
+++ b/samples/samples.status
@@ -5,6 +5,9 @@
 [ $arch == arm ]
 sample_extension/test/*: Skip # Issue 14705
 
+[ $builder_tag == optimization_counter_threshold ]
+sample_extension/test/sample_extension_app_snapshot_test: SkipByDesign # This test is too slow for testing with low optimization counter threshold.
+
 [ $compiler == app_jit ]
 sample_extension/test/sample_extension_app_snapshot_test: RuntimeError