build: Honor BUILD_GRILO_PLS conditional for example code

This was breaking the Continuous build.
Updated Norwegian bokmål translation
build: Add missing introspection dependency on gio

GIcon is defined in Gio-2.0, so add it to the Gir dependencies.

https://bugzilla.gnome.org/show_bug.cgi?id=723989
doc: Fix parameter name in API docs

https://bugzilla.gnome.org/show_bug.cgi?id=723989