kernel: updated French translation

[Kornél Pál]

Hi,

Laurent Vromman wrote:
> You often use the word "Mauvais" as a translation for "Bad". Sometimes, 
> it could be better not to translate literally. For example, I think 
> "Niveau de pilote incorrect" is a better translation for "Bad driver 
> level" than "Mauvais niveau de pilote". You should try to avoid 
> "Mauvais" anytime you can.

I think that using "bad" should be avoided in English texts as well and 
the original English version should also be improved not just the French 
one.

Kornél