Some platform (like atom-pc) enables rootless X,
thus the connman frontend run on it need the
permission to connect with connman by dbus.
This commit grants permission to xuser.
This fixes [YOCTO #779]
(From OE-Core rev: cfbf50c235c2faeb53f43b42a12c49c022288488)
Signed-off-by: Dongxiao Xu <dongxiao.xu@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>