cmake EVENT__HAVE_DECL_KERN_ARND examples

monkey/monkey mk_core/deps/libevent/CMakeLists.txt :416 

CHECK_SYMBOL_EXISTS(KERN_ARND sys/sysctl.h EVENT__HAVE_DECL_KERN_ARND)

fluent/fluent-bit lib/monkey/mk_core/deps/libevent/CMakeLists.txt :416 

CHECK_SYMBOL_EXISTS(KERN_ARND sys/sysctl.h EVENT__HAVE_DECL_KERN_ARND)