cmake HAVE_ACL_LIB examples

alibaba/AliSQLBackup storage/innobase/xtrabackup/src/libarchive/CMakeLists.txt :779 

CHECK_LIBRARY_EXISTS(acl "acl_get_file" "" HAVE_ACL_LIB)

alibaba/AliSQLBackup storage/innobase/xtrabackup/src/libarchive/CMakeLists.txt :784 

ENDIF(HAVE_ACL_LIB)