buildroot

pulseaudio: add optional dependency on bluez5_utils

The pulseaudio configure script autodetects the presence of
bluez 4.x and 5.x packages on the system and will exclude the
bluetooth-related modules in their absence.

This commit ensures that bluez5_utils, if selected, are installed
before pulseaudio. The same already happens for bluez_utils (4.x).

Signed-off-by: Calin Crisan <ccrisan at gmail dot com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>