[PATCH 2/2] ci: add mingw cross compilation in GHA

[Aaron Conole]

David Marchand <david.marchand at redhat.com> writes:

> Add mingw cross compilation in our public CI so that users with their
> own github repository have a first level of checks for Windows compilation
> before submitting to the mailing list.
> This does not replace our better checks in other entities of the CI.
>
> Only the helloworld example is compiled (same as what is tested in
> test-meson-builds.sh).
>
> Note: the mingw cross compilation toolchain (version 5.0) in Ubuntu
> 18.04 was broken (missing a ENOMSG definition).
>
> Signed-off-by: David Marchand <david.marchand at redhat.com>
> ---

Acked-by: Aaron Conole <aconole at redhat.com>