Create binstubs for executables when activating a package.

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

Index: sdk/lib/_internal/pub_generated/test/global/activate/missing_package_arg_test.dart
diff --git a/sdk/lib/_internal/pub_generated/test/global/activate/missing_package_arg_test.dart b/sdk/lib/_internal/pub_generated/test/global/activate/missing_package_arg_test.dart
index b2eec9e15b27d407c9e9f06172491d5b19b55e37..30abe5481c074ae8e0aca5c3383a3964cefc6509 100644
--- a/sdk/lib/_internal/pub_generated/test/global/activate/missing_package_arg_test.dart
+++ b/sdk/lib/_internal/pub_generated/test/global/activate/missing_package_arg_test.dart
@@ -1,17 +1,12 @@
+import 'package:scheduled_test/scheduled_test.dart';
 import '../../../lib/src/exit_codes.dart' as exit_codes;
 import '../../test_pub.dart';
 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.""",
+    schedulePub(
+        args: ["global", "activate"],
+        error: contains("No package to activate given."),
         exitCode: exit_codes.USAGE);
   });
 }