testchipip submodule not being initialised about fpga-zynq

[davidbiancolin]

@zhemao Can you update the README to reflect your changes to the repo over the past month? We can't let the README quality regress.

We probably want to update the make recipe "init-rocket-submodule" to initialize all submodules required for a fresh build appropriately, as the process is fairly nuanced now. Or remove the recipe altogether and explain it in the README.

[zhemao]

I'm just going to have all of the submodules get updated as a dependency of the rocketchip.stamp rule. This way, all you have to do is run make. I'll update README accordingly.

[ccelio]

How does that work if I want to use my own submodule branch? Will that undo me switching to a different commit?

[zhemao]

Good point. In that case I'll just have a separate init-submodules rule that initializes everything.

[zhemao]

Okay, I've updated this.

But there's a remaining issue that the instructions on building riscv-linux are out of date. I'll create a separate issue for that.