Fix NSME in `type_annotate_public_apis` (#151).

test/rules/type_annotate_public_apis.dart

 // Copyright (c) 2015, 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.
 
 const X = ''; //LINT
 
 f() {} //LINT
 
 void g(x) {} //LINT
 
 typedef Foo(x); //LINT
 
 typedef void Bar(int x);
 
+int get xxx => 42; //OK: #151
+
+get xxxx => 42; //LINT
+
+set x(x) { } //LINT
+
+set xx(int x) { } //OK
+
 _f() {}
 const _X = '';
 
 class A {
 
   var x; // LINT
   final xx = 1; //LINT
   static const y = ''; //LINT
   static final z = 3; //LINT
 
+  int get xxx => 42; //OK: #151
+
+  set xxxxx(x) { } //LINT
+
+  set xx(int x) { } //OK
+
+  get xxxx => 42; //LINT
+
   var zzz, //LINT
       _zzz;
 
   f() {} //LINT
   void g(x) {} //LINT
   static h() {} //LINT
   static void j(x) {} //LINT
   static void k(var v) {} //LINT
 
   var _x;
   final _xx = 1;
   static const _y = '';
   static final _z = 3;
 
   void m() {}
 
   _f() {}
   void _g(x) {}
   static _h() {}
   static _j(x) {}
   static _k(var x) {}
 }