test: flag known flake

refack · MylesBorins · commit 3b1db7f54bc7 · 2017-12-11T15:39:07.000-05:00
`test-inspector-async-hook-setup-at-signal` is also flaky on VS2017
diff --git a/test/sequential/sequential.status b/test/sequential/sequential.status
@@ -10,6 +10,7 @@ prefix sequential
 test-inspector-async-call-stack       : PASS, FLAKY
 test-inspector-bindings               : PASS, FLAKY
 test-inspector-debug-end              : PASS, FLAKY
+test-inspector-async-hook-setup-at-signal:  PASS, FLAKY
 
 [$system==linux]
 
