Comparison alarms are emitted for any comparison involving wide strings.

Even if we don't know what to do with the argument of the push, this at least
ensures that push/pop directives stay well parenthesized.

When loading some state, it may happen that some annotations are found to have
been emitted by emitters that are no longer usable. This commit let the kernel
adopt them, keeping them available as was the case before refactoring
`Annotations.code_annot` to use `Annotations.code_annot_emitter`.

All loop assigns corresponding to a given set of behaviors are now merged
together instead of being split into emitters. This is the same as what is done
for statement contracts and will make it much easier for callers to identify
appropriate loop assigns

Properly filters the single-precision values of function acos/asin/atan.
Also filters the last digit of some double precision values.

This is a workaround to avoid oracle differences due to imprecisions of the
system libc (on which the Eva math builtins rely).

By default in Frama-C, NaN values are considered as errors and should not be
produced by calls to library functions.

Only one builtin for the allocation functions.

Uses the eva_allocate annotation in the tests that used several builtins for
different calls to the same function.

Adds tests of the evaluation of \abs in logic.c.

a _noreturn attribute with c11 tag will be rendered as _Noreturn keyword