cmake HAVE_FLOCKFILE examples

arkdb/inception configure.cmake :391 

CHECK_FUNCTION_EXISTS (flockfile HAVE_FLOCKFILE)

alibaba/AliSQL configure.cmake :496 

CHECK_FUNCTION_EXISTS (flockfile HAVE_FLOCKFILE)

Tokutek/mysql-5.5 configure.cmake :331 

CHECK_FUNCTION_EXISTS (flockfile HAVE_FLOCKFILE)