Restored partest behavior of keeping output directories when run

with debugging enabled.  No review.

git-svn-id: http://lampsvn.epfl.ch/svn-repos/scala/scala/trunk@25278 5e8d7ff9-d8ef-0310-90f0-a4852d11357a

src/partest/scala/tools/partest/nest/Worker.scala

@@ -150,7 +150,10 @@ class Worker(val fileManager: FileManager, params: TestRunParams) extends Actor
   private def updateStatus(key: String, num: Int) = status(key) = num
   
   private def cleanup() {
-    toDelete foreach (_.deleteRecursively())
+    // keep output directories under debug
+    if (!isPartestDebug)
+      toDelete foreach (_.deleteRecursively())
+
     toDelete.clear()
   }
   sys addShutdownHook cleanup()