Fix error in status file test name

tests/standalone/standalone.status

 # Copyright (c) 2013, 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.
 
 # WARNING:
 # Tests using the multitest feature where failure is expected should *also* be
 # listed in tests/lib/analyzer/analyze_tests.status without the "standalone"
 # prefix.
 
 io/raw_socket_test: Pass, RuntimeError # Issue 28288
@@ skipping 298 matching lines @@
 verbose_gc_to_bmu_test: Skip
 
 io/platform_test: RuntimeError # Expects to be running from 'dart' instead of 'dart_precompiled_runtime'
 io/directory_list_sync_test: Timeout, Skip # Expects to find the test directory relative to the script.
 
 [ $runtime == vm && $system == windows && $mode == release ]
 io/http_server_close_response_after_error_test: Pass, Timeout # Issue 28370: timeout.
 io/regress_7191_test: Pass, Timeout # Issue 28374: timeout.
 
 [ $runtime == vm && $system == macos && $mode == release ]
-io/standalone/named_pipe_script_test: Pass, RuntimeError # Issue 28737
+io/named_pipe_script_test: Pass, RuntimeError # Issue 28737
 
 [ $runtime == vm && $system == linux && $mode == release && $arch == ia32 && $builder_tag == asan ]
 io/socket_close_test: Pass, Timeout # Issue 28502: timeout.
 
 [ $runtime == dart_precompiled || $mode == product ]
 io/skipping_dart2js_compilations_test: CompileTimeError # Imports dart:mirrors
 io/test_harness_analyzer_test: CompileTimeError # Imports dart:mirrors
 io/test_runner_test: CompileTimeError # Imports dart:mirrors
 
 [ $compiler == app_jit ]
@@ skipping 89 matching lines @@
 io/socket_source_address_test: SkipByDesign
 io/socket_bind_test: SkipByDesign
 io/http_proxy_advanced_test: SkipByDesign
 io/http_ipv6_test: SkipByDesign
 io/socket_ipv6_test: SkipByDesign
 io/socket_info_ipv6_test: SkipByDesign
 
 [ $builder_tag == asan && $arch == x64 ]
 io/process_detached_test: Pass, Slow
 io/named_pipe_script_test: RuntimeError