dbus: extract 'dbus-tools' from 'dbus-daemon'
Create a new sub-package called 'dbus-tools', which includes all the
independent command-line utilities provided by the reference
implementation. They are valid to be used with independent bus
implementations, so no reason to make them pull in dbus-daemon.
Signed-off-by: David Herrmann <dh.herrmann@gmail.com>