HPCC-8875 Enable core files for eclccserver

Signed-off-by: Gavin Halliday <gavin.halliday@lexisnexis.com>
Merge pull request #4020 from ghalliday/issue8875

HPCC-8875 Enable core files for eclccserver

Reviewed-By: Richard Chapman <rchapman@hpccsystems.com>