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

sdk/lib/_internal/pub_generated/test/get/path/shared_dependency_symlink_test.dart

+import 'package:path/path.dart' as path;
+import '../../descriptor.dart' as d;
+import '../../test_pub.dart';
+main() {
+  initConfig();
+  integration("shared dependency with symlink", () {
+    d.dir(
+        "shared",
+        [d.libDir("shared"), d.libPubspec("shared", "0.0.1")]).create();
+    d.dir("foo", [d.libDir("foo"), d.libPubspec("foo", "0.0.1", deps: {
+        "shared": {
+          "path": "../shared"
+        }
+      })]).create();
+    d.dir("bar", [d.libDir("bar"), d.libPubspec("bar", "0.0.1", deps: {
+        "shared": {
+          "path": "../link/shared"
+        }
+      })]).create();
+    d.dir(appPath, [d.appPubspec({
+        "foo": {
+          "path": "../foo"
+        },
+        "bar": {
+          "path": "../bar"
+        }
+      })]).create();
+    d.dir("link").create();
+    scheduleSymlink("shared", path.join("link", "shared"));
+    pubGet();
+    d.dir(
+        packagesPath,
+        [
+            d.dir("foo", [d.file("foo.dart", 'main() => "foo";')]),
+            d.dir("bar", [d.file("bar.dart", 'main() => "bar";')]),
+            d.dir("shared", [d.file("shared.dart", 'main() => "shared";')])]).validate();
+  });
+}