Now that I've upgraded my RPi 400 to aarch64, it turns out aarch64
isn't supported by Spidermoney or the libffi it ships with, so
there's no easy way to make it build.

Untill Spidermonkey is updated, there's just no reasonable way to
build on aarch64.

No need to build twice just to create the bundle.

In theory, a crazy person could grab it every day and upgrade it.

This reverts commit 2975dc62.

Apparently when the Gitlab Runner is using "cmd", you must do this or only
the first invoked bat file is executed. This explains why sbbsctrl.exe
(and other) files have been missing from the CI-generated artifact archives.
Back when I was using "powershell" to invoke the CI build for sbbs-windows
(my Gitlab-runner/config.toml file had shell = "powershell"), this wasn't an
issue, but this configuration stopped working on Vert at some point
(https://forum.gitlab.com/t/windows-10-gitlab-runner-fails-with-error-no-process-is-on-the-other-end-of-the-pipe/66691)
so I switched to "cmd", even though it's deprecated.

Remove the dependencies: [] line since that wasn't a solution to anything.

Goes under "job", not "artifacts".

I want all the artifacts (e.g. DLLs, EXEs) included in all artifact archives.
Per https://docs.gitlab.com/ee/ci/pipelines/job_artifacts.html,
"To disable artifact passing, define the job with empty dependencies"
So I think this is the right thing to do to accomplish what I want.

dpoker needs a little work first (can't find SDL.h).

This can likely be built on Windows, but since I expect I'll be the
only one supporting this for the forseeable future, get the build I
release in here.

<@Deuce> SyncTERM on MSVC really shouldn't be part of CI since it's not expected to work.
<DigitalMan> why not?
<@Deuce> Because it's not supported.
<@Deuce> So it's not part of the integration path.

The AMD64 platform on FreeBSD is called amd64, not x64.

Let's try just caching the 3rd party stuff.

Try capitalizing Linux tag.

Fix sexpots-linux build issue introduced in previous commit.

Remove archive names (uses build names by default?).
Remove "build-" from build names.