Eliminate old style import from language tests

tests/language/illegal_invocation_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.
 // Dart test program for constructors and initializers.
 //
 // Test for issue 1393.  Invoking a type alias or library prefix name caused
 // an internal error in dartc
 //
-#import("illegal_invocation_lib.dart", prefix:"foo");  /// 02: compile-time error
+import "illegal_invocation_lib.dart" as foo;  /// 02: compile-time error
 
 typedef void a();                 /// 01: compile-time error
 
 class Foo {}                      /// 04: compile-time error
 
 class Bar<T> {
   method() {
     T();                          /// 05: compile-time error
   }
 }
 
 main() {
   a();                           /// 01: continued
 
   // probably what the user meant was foo.foo(), but the qualifier refers
   // to the library prefix, not the method defined within the library.
   foo();                         /// 02: continued
 
   outer: for (int i =0 ; i < 1; i++) {
     outer();                     /// 03: compile-time error
   }
 
   Foo();                         /// 04: continued
 
   var bar = new Bar<int>();
   bar.method();                  /// 05: continued
 }