Fix the loops break label test with Kernel.

pkg/compiler/lib/src/ssa/loop_handler.dart

Index: pkg/compiler/lib/src/ssa/loop_handler.dart
diff --git a/pkg/compiler/lib/src/ssa/loop_handler.dart b/pkg/compiler/lib/src/ssa/loop_handler.dart
index 3b59a5f515b022308fc4e31d7fe1045dcfb57089..6e7ad540b2594492c0e9f7f5327ea04623d86d52 100644
--- a/pkg/compiler/lib/src/ssa/loop_handler.dart
+++ b/pkg/compiler/lib/src/ssa/loop_handler.dart
@@ -368,7 +368,7 @@ class KernelLoopHandler extends LoopHandler<ir.TreeNode> {
 
   @override
   JumpTarget getTargetDefinition(ir.TreeNode node) =>
-      astAdapter.getJumpTarget(node.parent);
+      astAdapter.getJumpTarget(node);
 
   @override
   int loopKind(ir.TreeNode node) => node.accept(new _KernelLoopTypeVisitor());