HPCC-8821 Don't optimize 1 character compare on ebcdic strings

Signed-off-by: Gavin Halliday <gavin.halliday@lexisnexis.com>
Merge pull request #3990 from ghalliday/issue8821

HPCC-8821 Don't optimize 1 character compare on ebcdic strings

Reviewed-By: Richard Chapman <rchapman@hpccsystems.com>