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

[timo.teras at iki dot fi]

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

Timo Teräs <timo.teras at iki dot fi> changed:

           What    |Removed                     |Added
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                 CC|                            |timo.teras at iki dot fi

--- Comment #21 from Timo Teräs <timo.teras at iki dot fi> ---
This caused a regression for non-multilib builds. Now my non-multilib lp64
build fails with:
a-cfinve.ads:245:04: warning: in instantiation at a-coboho.adb:55
a-cfinve.ads:245:04: warning: types for unchecked conversion have different
sizes

Probably because the logic added in this patch to Makefile.in picks up 64-bit
file only when multilib is enabled.