Fix run/t3569.scala under checkinit

Author: lrytz

test/files/run/t3569.scala

@@ -26,7 +26,8 @@ object Test {
     s.x += 1
     println(s.x)
 
-    (classOf[X].getDeclaredFields map ("" + _)).sorted foreach println
+    // under -Xcheckinit there's an additional $init$ field
+    (classOf[X].getDeclaredFields map ("" + _)).sorted.filter(_ != "private volatile byte Test$X.bitmap$init$0") foreach println
     (classOf[Y].getDeclaredFields map ("" + _)).sorted foreach println
   }
 }