cmake HAVE_DEVPOLL examples

mongodb/mongo-bi-connector-odbc-driver configure.cmake :427 

CHECK_INCLUDE_FILES(sys/devpoll.h HAVE_DEVPOLL)

zeromq/libzmq CMakeLists.txt :418 

check_include_files("sys/devpoll.h" HAVE_DEVPOLL)

alibaba/AliSQL configure.cmake :415 

CHECK_INCLUDE_FILES(sys/devpoll.h HAVE_DEVPOLL)

alibaba/AliSQLBackup configure.cmake :331 

CHECK_INCLUDE_FILES(sys/devpoll.h HAVE_DEVPOLL)