Add build and test of fake-vm to CI
This should be easy since the Cargo book provides an example of how to do that. We just have to take care that a top-level Makefile is used to build and run tests in fake-vm.
This should be easy since the Cargo book provides an example of how to do that. We just have to take care that a top-level Makefile is used to build and run tests in fake-vm.