Add static/dummy.go helloworld AE app.

examples/appengine/helloworld_standard/static/dummy.go

Index: examples/appengine/helloworld_standard/static/dummy.go
diff --git a/examples/appengine/helloworld_standard/static/dummy.go b/examples/appengine/helloworld_standard/static/dummy.go
new file mode 100644
index 0000000000000000000000000000000000000000..d7c825f79064c1857fcfaf990f06709589e9aaf7
--- /dev/null
+++ b/examples/appengine/helloworld_standard/static/dummy.go
@@ -0,0 +1,10 @@
+// Copyright 2016 The LUCI Authors. All rights reserved.
+// Use of this source code is governed under the Apache License, Version 2.0
+// that can be found in the LICENSE file.
+
+// A Go GAE module requires some .go files to be present, even if it is
+// a pure static module, and the gae.py tool does not support different
+// runtimes in the same deployment.
+// You can symlink dummy.go to your module like helloworld app does.

[tandrii(chromium), 2017/06/16 19:38:46]

but it doesn't :)

(copied this from scheduler app)

+
+package static