9P: fixes a regression introduced by delegation management. The 9P protocol handles no states.
    In order to have a clean code, constant STATE_LOCK_OWNER_9P is exposed in SAL, whatever the value
    of option "USE_9P" in CMake. There should be no impact on the mere NFS behavior.

Signed-off-by: Philippe DENIEL <philippe.deniel@cea.fr>
CMAKE: adds a "make rpm" target. This target builds rpm files and src.rpm file.

Signed-off-by: Philippe DENIEL <philippe.deniel@cea.fr>