Remove kernel-devel from build requirements
kernel-devel package was added because I thought it may resolve bluetooth
related build failure. After addition of dependency packages started building
again however with bluetooth support disabled.
Probably the *right* thing to do would be to move away from bluez
dependency, because code that use bluez-libs anyway. This is currently discussed
upstream.
See: https://github.com/the-tcpdump-group/libpcap/pull/417/