tor browser relies on external glib/dbus installation

using latest stable tor from today: Error loading shared library libdbus-glib-1.so.2: No such file or directory (needed by ./App/Firefox/libxul.so)

dbus is not a hard requirement for a fully working linux desktop, so it is highly undesirable to make tbb dependant on it.

according to http://www.linuxfromscratch.org/blfs/view/svn/xsoft/firefox.html the dependancy can easily be removed by adding ac_add_options --disable-dbus to mozconfig file.