cmake HAVE_ATOMIC_CAS_64 examples

alibaba/AliSQL storage/innobase/CMakeLists.txt :224 

CHECK_FUNCTION_EXISTS(atomic_cas_64 HAVE_ATOMIC_CAS_64)

Tokutek/mysql-5.5 storage/innobase/CMakeLists.txt :126 

CHECK_FUNCTION_EXISTS(atomic_cas_64 HAVE_ATOMIC_CAS_64)