cmake HAVE_NET_IF_DL_H examples

mysql/mysql-proxy CMakeLists.txt :180 

CHECK_INCLUDE_FILES(net/if_dl.h  HAVE_NET_IF_DL_H)

session-replay-tools/cetus CMakeLists.txt :146 

CHECK_INCLUDE_FILES(net/if_dl.h  HAVE_NET_IF_DL_H)