debugger: add new debugger test case

This case was previously failing on xplat JIT enabled debugging.

test/Debugger/empty.baseline

@@ -0,0 +1 @@
+[]

test/Debugger/failfast.js

@@ -0,0 +1,17 @@
+//-------------------------------------------------------------------------------------------------------
+// Copyright (C) Microsoft. All rights reserved.
+// Licensed under the MIT license. See LICENSE.txt file in the project root for full license information.
+//-------------------------------------------------------------------------------------------------------
+
+function empty() { }
+WScript.Attach(empty)
+WScript.Detach(empty)
+
+for (var i = 0; i < 10; i++)
+{
+    function emptyn() { }
+    WScript.Attach(emptyn)
+    WScript.Detach(emptyn)
+}
+
+print("PASS")

test/Debugger/rlexe.xml

@@ -1,5 +1,11 @@
 <?xml version="1.0" encoding="utf-8"?>
 <regress-exe>
+  <test>
+    <default>
+      <compile-flags>-dbgbaseline:empty.baseline</compile-flags>
+      <files>failfast.js</files>
+    </default>
+  </test>
   <test>
     <default>
       <compile-flags>-dbgbaseline:JsDiagBreakpoints.js.dbg.baseline</compile-flags>