cmake HAVE_DECL_MADVISE examples

alibaba/AliSQL configure.cmake :666 

CHECK_SYMBOL_EXISTS(madvise "sys/mman.h" HAVE_DECL_MADVISE)

arkdb/arkproxy configure.cmake :451 

CHECK_SYMBOL_EXISTS(madvise "sys/mman.h" HAVE_DECL_MADVISE)

alibaba/AliSQLBackup configure.cmake :581 

CHECK_SYMBOL_EXISTS(madvise "sys/mman.h" HAVE_DECL_MADVISE)