libpcap: add support for bluez5_utils

bluez5_utils support has been added since version 1.8.0 and
https://github.com/the-tcpdump-group/libpcap/commit/b3776f3d50df9de9fcf702bd21a3ecb2539ffef4



Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Reviewed-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>