Store the async-await compiled pub code directly in the repo.

sdk/lib/_internal/pub_generated/test/get/hosted/stay_locked_test.dart

Index: sdk/lib/_internal/pub_generated/test/get/hosted/stay_locked_test.dart
diff --git a/sdk/lib/_internal/pub_generated/test/get/hosted/stay_locked_test.dart b/sdk/lib/_internal/pub_generated/test/get/hosted/stay_locked_test.dart
new file mode 100644
index 0000000000000000000000000000000000000000..6e66a10b5d8f0a133f01be6f1688c09e669ade49
--- /dev/null
+++ b/sdk/lib/_internal/pub_generated/test/get/hosted/stay_locked_test.dart
@@ -0,0 +1,27 @@
+library pub_tests;
+import 'package:path/path.dart' as path;
+import 'package:scheduled_test/scheduled_test.dart';
+import '../../../lib/src/io.dart';
+import '../../descriptor.dart' as d;
+import '../../test_pub.dart';
+main() {
+  initConfig();
+  integration(
+      'keeps a pub server package locked to the version in the ' 'lockfile',
+      () {
+    servePackages((builder) => builder.serve("foo", "1.0.0"));
+    d.appDir({
+      "foo": "any"
+    }).create();
+    pubGet();
+    d.packagesDir({
+      "foo": "1.0.0"
+    }).validate();
+    schedule(() => deleteEntry(path.join(sandboxDir, packagesPath)));
+    servePackages((builder) => builder.serve("foo", "1.0.1"));
+    pubGet();
+    d.packagesDir({
+      "foo": "1.0.0"
+    }).validate();
+  });
+}