[cs] use Test_Debug.exe instead of cs.exe

tests/unit/unit.html

@@ -139,7 +139,7 @@ iframe {
 </div>
 <div class="window">
   <div class="label">C#</div>
-  <div id="csharp_container" class="cont"><iframe src="runexe.n?cs/bin/cs"></iframe></div>
+  <div id="csharp_container" class="cont"><iframe src="runexe.n?cs/bin/Test-Debug"></iframe></div>
 </div>
 <div class="window">
   <div class="label">C#-unsafe</div>