iucvconn/iucvtty: Direct --help output to stdout
iucvconn/iucvtty: Direct --help output to stdout

Both iucvconn and iucvtty write output for --help to stderr. To be
consistent with other s390-tools and GNU coding guide lines,
fix this by using stdout for tool-generated usage help.

Reviewed-by: Hendrik Brueckner <ea0a2d16c17dd61debc108adbc0ac849646dd099@linux.ibm.com>
Signed-off-by: Peter Oberparleiter <e296756d5edaffcdbc7b9904859492ff25d3fce5@linux.ibm.com>
Signed-off-by: Jan Höppner <96138615ab4af0813785fa10d283f3d37eca3b78@linux.ibm.com>

ibm-s390-tools/s390-tools,ibm-s390-tools/s390-tools,ibm-s390-tools/s390-tools,ibm-s390-tools/s390-tools