cmake EVENT__HAVE_ARC4RANDOM_ADDRANDOM examples

GreatSQL/GreatSQL extra/libevent/libevent-2.1.11-stable/CMakeLists.txt :534 

UNSET(EVENT__HAVE_ARC4RANDOM_ADDRANDOM)

GreatSQL/GreatSQL extra/libevent/libevent-2.1.11-stable/CMakeLists.txt :535 

UNSET(EVENT__HAVE_ARC4RANDOM_ADDRANDOM CACHE)

percona/percona-server extra/libevent/libevent-2.1.11-stable/CMakeLists.txt :542 

UNSET(EVENT__HAVE_ARC4RANDOM_ADDRANDOM)

percona/percona-server extra/libevent/libevent-2.1.11-stable/CMakeLists.txt :543 

UNSET(EVENT__HAVE_ARC4RANDOM_ADDRANDOM CACHE)

facebook/mysql-5.6 extra/libevent/libevent-2.1.11-stable/CMakeLists.txt :534 

UNSET(EVENT__HAVE_ARC4RANDOM_ADDRANDOM)

facebook/mysql-5.6 extra/libevent/libevent-2.1.11-stable/CMakeLists.txt :535 

UNSET(EVENT__HAVE_ARC4RANDOM_ADDRANDOM CACHE)

polardb/polardbx-engine extra/libevent/libevent-2.1.11-stable/CMakeLists.txt :534 

UNSET(EVENT__HAVE_ARC4RANDOM_ADDRANDOM)

polardb/polardbx-engine extra/libevent/libevent-2.1.11-stable/CMakeLists.txt :535 

UNSET(EVENT__HAVE_ARC4RANDOM_ADDRANDOM CACHE)

percona/percona-xtradb-cluster extra/libevent/libevent-2.1.11-stable/CMakeLists.txt :534 

UNSET(EVENT__HAVE_ARC4RANDOM_ADDRANDOM)

percona/percona-xtradb-cluster extra/libevent/libevent-2.1.11-stable/CMakeLists.txt :535 

UNSET(EVENT__HAVE_ARC4RANDOM_ADDRANDOM CACHE)