Tuple and changes for m68k with -malign-int

[Florian Weimer]

* John Paul Adrian Glaubitz via Libc-help:

> I was just looking at the necessary changes to switch m68k to 32-bit alignment
> and I'm not sure we need to do anything about glibc. I am documenting my current
> findings here [1].

>> [1] https://wiki.debian.org/M68k/Alignment

Why doesn't this change need a new target triple?  This change alters
struct layout (it introduces new padding in some cases), so it's quite
incompatible with what we have today.

Thanks,
Florian