[RFAv3 2/6] Improve process exit status macros on MinGW

[Eli Zaretskii]

> From: Pedro Alves <palves@redhat.com>
> Date: Mon, 27 May 2019 18:33:11 +0100
> 
> I admit to being a bit confused about why we want to do this
> translation for this feature while we don't do it for the exit code
> of inferiors running under gdb, for example.  I mean, exit status
> with 0xc0000000 set don't cause $_exitsignal to be set instead of
> $_exitcode.

We should probably do this everywhere where it matters whether the
inferior exited due to a fatal signal.