HPCC-11370 Include severity information warnings in the eclcc output

Signed-off-by: Gavin Halliday <gavin.halliday@lexisnexis.com>
Merge pull request #5889 from ghalliday/issue11370

HPCC-11370 Include severity information warnings in the eclcc output

Reviewed-By: Gordon Smith <gordon.smith@lexisnexis.com>
Reviewed-By: Richard Chapman <rchapman@hpccsystems.com>