Make the exit code for dartanalyzer more deterministic.

pkg/analyzer_cli/test/all.dart

 // Copyright (c) 2015, 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.
 
 import 'analysis_options_test.dart' as analysis_options_test;
 import 'build_mode_test.dart' as build_mode_test;
 import 'driver_test.dart' as driver_test;
 import 'embedder_test.dart' as embedder_test;
 import 'error_test.dart' as error_test;
 import 'errors_reported_once_test.dart' as errors_reported_once_test;
+import 'errors_upgrade_fails_cli_test.dart' as errors_upgrade_fails_cli_test;
 import 'options_test.dart' as options_test;
 import 'package_prefix_test.dart' as package_prefix_test;
 import 'perf_report_test.dart' as perf_report_test;
 import 'reporter_test.dart' as reporter_test;
 import 'sdk_ext_test.dart' as sdk_ext_test;
 import 'super_mixin_test.dart' as super_mixin_test;
 //import 'strong_mode_test.dart' as strong_mode_test;
 
 main() {
   analysis_options_test.main();
   build_mode_test.main();
   driver_test.main();
   embedder_test.main();
   error_test.main();
   errors_reported_once_test.main();
+  errors_upgrade_fails_cli_test.main();
   options_test.main();
   package_prefix_test.main();
   perf_report_test.main();
   reporter_test.main();
   sdk_ext_test.main();
   super_mixin_test.main();
   // TODO(pq): fix tests to run safely on the bots
   // https://github.com/dart-lang/sdk/issues/25001
   //strong_mode_test.main();
 }