Fix closure lib to ol3 version

At the moment we are relying on the master version of closure library. A recent update broke the app in test. Maybe this commit https://github.com/google/closure-library/commit/bd304248f8bf0254d9b99d8e5b071c8d7dd0212c#diff-97793ad6fce25c1435ef52bf41ea519b

This PR fixes this issue and relies on the same version than ol3.
https://github.com/openlayers/ol3/blob/master/closure-util.json

Please review and merge ASAP.

To test:
`make cleanall all`
yeah master