Language tests updated to use const instead of final.

tests/language/assign_static_type_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. 
+// 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.
 
 // This test insures that statically initialized variables, fields, and parameters
 // report static type warnings.
 
 int a = "String";  /// 01: static type warning, dynamic type error
 
 class A {
-  static final int c = "String"; /// 02: static type warning, dynamic type error
+  static const int c = "String"; /// 02: static type warning, dynamic type error
   final int d = "String"; /// 03: static type warning, dynamic type error
   int e = "String"; /// 04: static type warning, dynamic type error
    A() {
      int f = "String"; /// 05: static type warning, dynamic type error
    }
   method([
      int  /// 06: static type warning
      g = "String"]) {
     return g;
   }
 }
 
 int main() {
   var w = a; /// 01: continued
   var x;
   x = A.c;  /// 02: continued
   var v = new A();
   x = v.d;  /// 03: continued
   x = v.e;  /// 04: continued
       x = v.method(1); /// 06: continued
 }