Feature/preprocessor fc libc

Mise à jour des oracles suite au commit frama-c/frama-c@4f01d985 . À merger quand frama-c/frama-c!201 sera elle-même mergée dans le noyau.

See merge request !6

[translation] add a missing cast when an integer is used in a floating point/real context (was revealed by a Value's change, and now reveals a bug with == over reals)

[tests] update oracles according to various recent kernel changes