qt5connectivity: propagate bluez-utils dependencies

qt5connectivity selects the bluez-utils package but the dependencies are
not fully propagated so someone could do a static build, then select the
qt5connectivity package causing bluez-utils being auto-selected, which
is disabled for static builds, and then obtain a build failure like this
one:

checking for dlopen in -ldl... no
configure: error: dynamic linking loader is required

Fixes:
	http://autobuild.buildroot.net/results/96d/96d8297be0b731da138b1e2aafb851061aee3c40/



Signed-off-by: Vicente Olivert Riera <Vincent.Riera@imgtec.com>
Acked-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>