Wrong resolution order for dynamically imported modules in 3.1.6

Dynamically imported modules are sorted *before* any other entry since #295.

Let's assume an entry point `main.js`:
```js
import './styles.css'
import('./dynamic.js').then(...)
```
and a dynamically imported module `dynamic.js`:
```js
import './dynamic-styles.css`
```

Before #295 the css bundle had `styles.css` content before `dynamic-styles.css` content. Now the order is inverted.

The `moduleIds` array returned from `getRecursiveImportOrder` is missing the module ids found by using `getModuleInfo(id).dynamicallyImportedIds`. The previous definition based on `this.moduleIds` had them.

Dynamically imported modules should also have a stable order among themselves.

@wardpeet can I ask for your help?