add better support for linux profile creation

[trinity-1686a]

Profile creation does not work on all Linux distributions out of the box. This PR attempt to make it work on more distributions with the following changes:

• run dmesg as root as depending on CONFIG_SECURITY_DMESG_RESTRICT it might not be possible to read kernel buffer for non-root
• if System.map is not found in /boot (some distributions such as ArchLinux don't provide a System.map), instead try getting it from procfs (requires root to get addresses non zeroed)

edit: ci failure seams unrelated to this patch

[bamiaux]

Thanks for the fix, it is now merged into the main branch. The CI failure is unrelated, I'll look into it later