docs: add testing instructions to CONTRIBUTING.md

[rgo3]

Signed-off-by: Robin Gögge r.goegge@outlook.com

[ti-mo]

Thanks! Looping in @lmb because I'm not sure if we want to 'hardcode' 5.4 in the docs here, since it'll eventually go away.

[rgo3]

Fair point with the version, I picked it because it was the example from the script comment. Should I change it to something like ./run-tests.sh <kernel-version>?

[ti-mo]

Fair point with the version, I picked it because it was the example from the script comment. Should I change it to something like ./run-tests.sh <kernel-version>?

Actually, 5.4 is LTS, so should be fine having it there. <kernel-version> doesn't tell the user which versions are available to test.

[rgo3]

Ok, Ill change the sudo command example and push the changes then :).

[ti-mo]

Thank you!