In #14388 the following syntax is used in the source:
```
import * as view_utils from './linker/view_utils';
import * as viewEngine from './view/index';
…
export {view_utils as ɵview_utils};
export {viewEngine as ɵviewEngine};
```
The usage of `export {... as ...}` was not being recognised by dgeni.
It is now being recognised and a temporary dummy output file is being
rendered. Later we will either ignore this doctype altogether or find
a better way of rendering it.
Pete Bacon Darwin