pulseaudio: only package consolekit module when x11 is enabled

As requested by Martin Jansa <martin.jansa@gmail.com>.

(From OE-Core master rev: 3e148f863d55728bbfa2d94b602b03dc56b70d4c)

Signed-off-by: Christopher Larson <kergoth@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>