cmake HAVE_RDTSCLL examples

arkdb/inception configure.cmake :551 

CHECK_FUNCTION_EXISTS(rdtscll HAVE_RDTSCLL)

alibaba/AliSQL configure.cmake :658 

CHECK_FUNCTION_EXISTS(rdtscll HAVE_RDTSCLL)

Tokutek/mysql-5.5 configure.cmake :474 

CHECK_FUNCTION_EXISTS(rdtscll HAVE_RDTSCLL)