cyclictest: consider the 4 as the major version

Teach cyclictest to recognize the major version 4 which we do have now.
Featurewise it should behave like the 3.0 series

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: John Kacur <jkacur@redhat.com>