HPCC-9639 Roxie may segfault on startup if previous 4.0 build used

If files on the dali were copied using an earlier release candidate of 4.0.0,
rc-14 roxie may core on startup.

Signed-off-by: Richard Chapman <rchapman@hpccsystems.com>
Merge pull request #4619 from richardkchapman/recreate-clone-segfault

HPCC-9639 Roxie may segfault on startup if previous 4.0 build used

Reviewed-by: Gavin Halliday <ghalliday@hpccsystems.com>