TEMPORARY - Validate fix for 16994 with some caveats

tests/standalone/io/platform_executable_script.dart

Index: tests/standalone/io/platform_executable_script.dart
diff --git a/tests/language/built_in_identifier_prefix_library_as.dart b/tests/standalone/io/platform_executable_script.dart
similarity index 78%
copy from tests/language/built_in_identifier_prefix_library_as.dart
copy to tests/standalone/io/platform_executable_script.dart
index 96ce332ddd63f6edc5193585fe6bd3d4d7094da6..5056ade6df1d071994ef6c8b7550bf4165fc25c5 100644
--- a/tests/language/built_in_identifier_prefix_library_as.dart
+++ b/tests/standalone/io/platform_executable_script.dart
@@ -2,13 +2,6 @@
 // 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.
 
-library as;
+import 'dart:io';
 
-class A {
-}
-
-class B<T> {
-}
-
-class C<T, S> {
-}
+void main() => print(Platform.executable);