HPCC-8814 OUTPUT(dictionary) was not working

Add OUTPUT(dictionary) and dictionary (implying output) to grammar.

Signed-off-by: Richard Chapman <rchapman@hpccsystems.com>
Merge pull request #3978 from richardkchapman/dict-output-2

HPCC-8814 OUTPUT(dictionary) was not working

Reviewed-by: Gavin Halliday <ghalliday@hpccsystems.com>