gnome-bluetooth: Add check to require x11
gnome-bluetooth needs libcanberra compiled with gtk+3 support, compiling
libcanberra with gtk+3 support would need gtk+ which needs X11 to
support the needed backend, other option is directfb which will not
worrk work with wayland(without X) config either
Signed-off-by: Khem Raj <raj.khem@gmail.com>