Fuchsia: Build standalone VM. Make it run "Hello, World!".

runtime/tests/vm/dart/hello_fuchsia_test.dart

Index: runtime/tests/vm/dart/hello_fuchsia_test.dart
diff --git a/tests/html/js_type_test_js.js b/runtime/tests/vm/dart/hello_fuchsia_test.dart
similarity index 84%
copy from tests/html/js_type_test_js.js
copy to runtime/tests/vm/dart/hello_fuchsia_test.dart
index 1f12f38ea0c64c22aa929bc33a976c51a80208ea..501ffe759fecb0e616b46588a6148b28963ac47a 100644
--- a/tests/html/js_type_test_js.js
+++ b/runtime/tests/vm/dart/hello_fuchsia_test.dart
@@ -2,4 +2,6 @@
 // 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.
 
-function Foo() {}
+main() {
+  print("Hello, Fuchsia!");
+}