dbus: ensure dbus user is created

Since we are changing the default dbus user, make sure this user is
consistently created.

Signed-off-by: Samuel Martin <s.martin49@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/dbus/dbus.mk

@@ -30,6 +30,10 @@ DBUS_CONF_OPT = --with-dbus-user=dbus \
 		--with-system-socket=/var/run/dbus/system_bus_socket \
 		--with-system-pid-file=/var/run/messagebus.pid
 
+define DBUS_USERS
+	dbus -1 dbus -1 * /var/run/dbus - dbus DBus messagebus user
+endef
+
 ifeq ($(BR2_PREFER_STATIC_LIB),y)
 DBUS_CONF_OPT += LIBS='-lpthread'
 endif