[GTK] Updated Dutch translation
https://bugs.webkit.org/show_bug.cgi?id=126365

Patch by Reinout van Schouwen <reinouts@gnome.org> on 2014-01-05
Reviewed by Gustavo Noronha.

* nl.po: Updated.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@161324 268f45cc-cd09-0410-ab3c-d52691b4dbfc