[PATCH] Fix alignment of stack slots for overaligned types [PR103500]

[Florian Weimer]

* Alex Coplan via Gcc-patches:

> Bootstrapped and regtested on aarch64-linux-gnu, x86_64-linux-gnu, and
> arm-linux-gnueabihf: no regressions.
>
> I'd appreciate any feedback. Is it OK for trunk?

Does this need an ABI warning?

Thanks,
Florian