test: marking new flaky test

PR-URL: #265
Reviewed-By: Kunal Pathak <kunal.pathak@microsoft.com>
Reviewed-By: Hitesh Kanwathirtha <hiteshk@microsoft.com>

Author: kfarnung

test/async-hooks/async-hooks.status

@@ -0,0 +1,10 @@
+prefix async-hooks
+
+# To mark a test as flaky, list the test name in the appropriate section
+# below, without ".js", followed by ": PASS,FLAKY". Example:
+# sample-test                        : PASS,FLAKY
+
+[true] # This section applies to all platforms
+
+[$jsEngine==chakracore]
+test-promise : PASS,FLAKY