cmake HAVE_PCAP_OPEN_DEAD examples

usb-tools/USBProxy-legacy src/cmake/modules/FindPCAP.cmake :105 

CHECK_FUNCTION_EXISTS("pcap_open_dead" HAVE_PCAP_OPEN_DEAD)

boundary/wireshark cmake/modules/FindPCAP.cmake :114 

CHECK_FUNCTION_EXISTS("pcap_open_dead" HAVE_PCAP_OPEN_DEAD)

gnss-sdr/gnss-sdr cmake/Modules/FindPCAP.cmake :125 

check_function_exists("pcap_open_dead" HAVE_PCAP_OPEN_DEAD)