fix: No JS module 'dbus' found in search path

tested on gnome-shell-3.8.1

Error was : 

Apr 23 11:08:07 localhost /etc/gdm/Xsession[537]: JS ERROR: !!!   Exception was: Error: No JS module 'dbus' found in search path
Apr 23 11:08:07 localhost /etc/gdm/Xsession[537]: JS ERROR: !!!     message = '"No JS module 'dbus' found in search path"'
Apr 23 11:08:07 localhost /etc/gdm/Xsession[537]: JS LOG: Extension "gnome-extension-ofono" had error: Error: No JS module 'dbus' found in search path