cmake HAVE_NETINET_IF_ETHER_H examples

asset-group/5ghoul-5g-nr-attacks libs/libpcap/CMakeLists.txt :407 

check_include_file(netinet/if_ether.h HAVE_NETINET_IF_ETHER_H)

CTSRD-CHERI/cheribsd contrib/libpcap/CMakeLists.txt :663 

check_include_file(netinet/if_ether.h HAVE_NETINET_IF_ETHER_H)