[mycpp] add souffle binary build library

[melvinw]

Splitting this out from #1981

[andychu]

Thanks, this generally looks good

Can you write a self-contained shell smoke test ? (outside Ninja)

• to run the built souffle on some kind of "hello world"
• maybe compile and run the output (if it's easy)

Might just be 2-3 lines

---

We actually moved most things to the "wedge" system, which

1. runs on contributor machines, and is automated with CI tasks dev-setup-{alpine,debian}
2. gets baked into the Docker images (so we don't rebuild re2c/souffle every time)

Example here with uftrace:

https://github.com/oilshell/oil/blob/master/deps/source.medo/uftrace/WEDGE#L81

I should be able to make the wedge itself and the Docker image/layers

But the automated smoke test example will help

[melvinw]

Pushed a skeleton for the wedge with a smoke test

[andychu]

OK thanks, I will run this locally and add it to the cpp-* CI images (the ones that have mycpp)

Might take a few days, I'll let you know

[melvinw]

Sounds good. Let me know if you run into any issues!