"goog is not defined" error

Steps to reproduce:

```
cd ./ghcjs-examples/weblog/race
ghcjs -o race race.js
cp race.html ./race.jsexe
cd race.jsexe
open race.html
```

The example works fine (as expected), however my firefox's console shows `ReferenceError: goog is not defined` error for this line in lib.js: https://i.imgur.com/AslTLFK.png
