extra/vm: Install & start `lirc` automatically

The user will still have to provide their own `lircd.conf` file
describing their remote control's infrared protocol.

This uses `DEBIAN_FRONTEND=noninteractive` to stop `apt-get` prompting
the user to select a hardware and infrared protocol configuration.
First, the available configurations are highly confusing, they don't
contain hardware like the RedRat3-II, and are unlikely to contain the
protocol that the user is interested in. Second, there is no interactive
terminal available during `vagrant up`, so the `apt-get install` command
would garble the terminal output and fail.