This adds files to build and run two Docker images:
- run: Build a Docker container that can be used as an executable
drop-in for verilator. This can be useful to test behavior of
older versions or a development version. The functionality is
pretty simplistic at the moment for a start.
- buildenv: Everything needed to build and test Verilator. Useful to
run quick tests in the cloud or try other compilers. It can
also serve as basis for further CI integration.
