Tweak test status (not failing on linux?)

tests/language/language_dart2js.status

 # 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.
 
 [ $compiler == dart2js || $compiler == dart2dart ]
 # VM specific tests that should not be run by dart2js.
 *vm_test: Skip
 *vm_negative_test: Skip
 
 [ $compiler == dart2js && $checked ]
@@ skipping 314 matching lines @@
 
 
 [ $compiler == dart2js && $runtime == none ]
 *: Fail, Pass # TODO(ahe): Triage these tests.
 
 
 [ $compiler == dart2js && $runtime == ff ]
 call_through_getter_test: Fail # Expected: ObjectNotClosureException got: Instance of 'TypeError'
 call_through_null_getter_test: Fail # Expected: ObjectNotClosureException got: Instance of 'TypeError'
 double_to_string_as_fixed_test: Fail
+
+[ $compiler == dart2js && $runtime == ff && $system == windows ]
 export_test: Fail # Issue 5785
 export_cyclic_test: Fail # Issue 5785
 generic_creation_test: Fail # Issue 5785l
 
 
 [ $compiler == dart2js && $runtime == ie ]
 call_through_getter_test: Fail
 call_through_null_getter_test: Fail
 div_by_zero_test: Fail
 double_to_string_as_fixed_test: Fail
@@ skipping 12 matching lines @@
 method_invocation_test: Fail # Uncaught error: Instance of 'TypeError'
 null_pointer_exception_test: Fail # Uncaught error: Instance of 'TypeError'
 string_interpolate_npe_test: Fail # Uncaught error: Instance of 'TypeError'
 
 [ $compiler == dart2js && $runtime == ff && $system == windows ]
 prefix_new_test: Fail # TODO(ahe): Enable wrapper-less tests on Firefox/Windows.
 typed_message_test: Fail # http://dartbug.com/5383
 first_class_types_test: Fail # http://dartbug.com/5523
 part2_test: Fail # TODO(ahe): Enable wrapper-less tests on Firefox/Windows.
 part_test: Fail # TODO(ahe): Enable wrapper-less tests on Firefox/Windows.