test rename overhaul: step 8 - language tests

tests/language/private_member_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.
 
 #library('PrivateMemberLibA');
 
-#import('PrivateMemberLibB.dart');
+#import('private_member_lib_b.dart');
 
 class A {
   int i;
   int _instanceField;
   static int _staticField;
   int _fun1() { return 1; }
   void _fun2(int i) { }
 }
 
 class Test extends B {
   test() {
     i = _instanceField;
     i = A._staticField;
     i = _fun1();
     _fun2(42);
   }
 }
 
 void main() {
   new Test().test();
 }