Goblint_lib.LibraryFunctionsHard-coded database of library function specifications.
This is for when we need to use special transfer function on functions calls that have definitions.
val find : GoblintCil.Cil.varinfo -> LibraryDesc.tFind library function descriptor for special function (as per is_special).
val is_special : GoblintCil.Cil.varinfo -> boolCheck if function is treated specially.
val verifier_atomic_var : GoblintCil.Cil.varinfo