[m-rev.] for review: Delete use of signal handlers taking sigcontext arguments.

[Peter Wang]

Ignore this one. I've resent a slightly updated version of it in
a patch series.

On Mon, 12 Oct 2020 15:43:00 +1100 Peter Wang <novalazy at gmail.com> wrote:
> The configure checks for sigcontext (aka sigcontext_struct) have failed
> for a long time without anyone noticing. The MR_GET_FAULT_ADDR macro
> that is also needed for the sigcontext code paths was only ever defined
> for __i386__ and __mc68000__.