package/libpcap: fix bluez5_utils-headers dependency

package/libpcap: fix bluez5_utils-headers dependency

Commit c46afc37dc877f1e94ffde0d77585290711b27ec changed bluez5-utils
dependency by bluez5_utils-headers without replacing the test on
BR2_PACKAGE_BLUEZ5_UTILS by BR2_PACKAGE_BLUEZ5_UTILS_HEADERS

Fix this mistake and also add a select on
BR2_PACKAGE_BLUEZ5_UTILS_HEADERS if BR2_PACKAGE_BLUEZ5_UTILS is set
so the user does not have to do it

Fixes:
 - http://autobuild.buildroot.org/results/c6828df1f3782564451ddd4187ff026679bf37d8

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Acked-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>