1.6.1 NX support fails on system with many logs

[rumherb]

dmesg log is often limited. So the rule 1.6.1 fails and breaks continuation of the role even while NX protection is active.
An alternate working solution would be:
journalctl -b | grep 'Execute Disable' | grep 'protection: active'

this also works with Ubuntu 18.04 and on servers with a very long uptime.