Silence compiler warning by providing proper CONFIG_BLUEZ-independent
header for the bt-host API.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6809 c046a42c-6fe2-441c-8c8c-71466251a162