[Bug ada/80117] Standard'Word_Size is wrong for aarch64 ILP32

[ebotcazou at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80117

--- Comment #9 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
> What is the definition of System.Word_Size anyway?

The language RM says (13.7/32):

   Word_Size
    The number of bits per word.