Fix braino in Selector.==: check the kind too.

tests/language/interceptor2_test.dart

+// Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+// Regression test for issue http://dartbug.com/6903: dart2js used to
+// not generate an interceptor forwarder when a getter call and a
+// method call on an intercepted method were both used.
+
+class A { get iterator => () => 499; }
+
+main() {
+  var a = [new A(), [1, 1]];
+  Expect.equals(499, a[0].iterator());
+  Expect.equals(499, (a[0].iterator)());
+  for (var i in a[1]) {
+    Expect.equals(1, i);
+  }
+}