Issue 5064. Some more 'skip' tests triage

tests/standalone/standalone.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.
 
 package/invalid_uri_test: Fail, OK # Fails intentionally
 
 [ $runtime == vm && $checked ]
 # These tests have type errors on purpose.
 io/process_invalid_arguments_test: Fail, OK
 io/directory_invalid_arguments_test: Fail, OK
@@ skipping 53 matching lines @@
 crypto/*: Skip  # dartc cannot parse dart:io unit tests.
 io/mime_multipart_parser_test: Skip  # dartc cannot parse dart:io unit tests.
 io/http_headers_test: Skip  # dartc cannot parse dart:io unit tests.
 io/http_date_test: Skip  # dartc cannot parse dart:io unit tests.
 io/url_encoding_test: Skip  # dartc cannot parse dart:io unit tests.
 io/http_parser_test: Skip  # dartc cannot parse dart:io unit tests.
 io/web_socket_protocol_processor_test: Skip  # dart:io unit test.
 
 io/process_exit_negative_test: Fail  # This is a compilation-time negative test.
 
-io/status_file_parser_test: Skip  # test.dart uses old syntax.  Issue 7387.
-status_expression_test: Skip  # test.dart uses old syntax.  Issue 7387.
-io/test_runner_test: Skip  # test.dart uses old syntax.  Issue 7387.
-
 [ $compiler == frog ]
 *: Skip
 
 [ $arch == arm ]
 *: Skip
 
 
 [ $arch == simarm ]
 *: Skip
 
@@ skipping 21 matching lines @@
 [ $compiler == dart2js && $browser ]
 *: Skip
 
 [ $compiler == dart2js && $checked ]
 io/http_read_test: Skip # Timeout TODO(ngeoffray): investigate
 io/list_input_stream_test: Skip # Timeout TODO(ngeoffray): investigate
 
 [ $compiler == dart2dart ]
 # Skip until we stabilize language tests.
 *: Skip