Create binstubs for executables when activating a package.

sdk/lib/_internal/pub/test/global/activate/missing_package_arg_test.dart

Index: sdk/lib/_internal/pub/test/global/activate/missing_package_arg_test.dart
diff --git a/sdk/lib/_internal/pub/test/global/activate/missing_package_arg_test.dart b/sdk/lib/_internal/pub/test/global/activate/missing_package_arg_test.dart
index 9469de2d7faea02aea2ddc7eff4ae617ef991a80..72fbc9724ad3ebe71ca2cb03b6fa9516d5bcf6bf 100644
--- a/sdk/lib/_internal/pub/test/global/activate/missing_package_arg_test.dart
+++ b/sdk/lib/_internal/pub/test/global/activate/missing_package_arg_test.dart
@@ -2,6 +2,8 @@
 // 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 'package:scheduled_test/scheduled_test.dart';
+
 import '../../../lib/src/exit_codes.dart' as exit_codes;
 import '../../test_pub.dart';
 
@@ -9,15 +11,7 @@ main() {
   initConfig();
   integration('fails if no package was given', () {
     schedulePub(args: ["global", "activate"],
-        error: """
-            No package to activate given.
-
-            Usage: pub global activate <package...>
-            -h, --help      Print usage information for this command.
-            -s, --source    The source used to find the package.
-                            [git, hosted (default), path]
-
-            Run "pub help" to see global options.""",
+        error: contains("No package to activate given."),
         exitCode: exit_codes.USAGE);
   });
 }