[turbofan] Fix handling of OsrLoopEntry in ControlReducer::ConnectNTL()

test/mjsunit/regress/regress-469605b.js

+// Copyright 2015 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+function counter() {
+  var i = 10000;
+  return function() {
+    if (i-- > 0) return i;
+    throw "done";
+  }
+}
+
+
+var f = (function() {
+  "use asm";
+  return function f(i, c1, c2) {
+    i = i|0;
+    do {
+      if (i > 0) { while (0 ? this : this) { c1(); } }
+      else c2();
+    } while (true);
+  }
+})();
+
+assertThrows(function() { f(0, counter(), counter()); });
+assertThrows(function() { f(1, counter(), counter()); });