Merge pull request ceph#50301 from liuqinfei/support_compile_on_openeuler_main

ceph.spec.in: add support for openEuler OS

Reviewed-by: Rongqi Sun <[email protected]>
Reviewed-by: Ilya Dryomov <[email protected]>
Reviewed-by: Laura Flores <[email protected]>

Author: yuriw