Motivation for this change

ujprog is a JTAG programmer for the ULX3S and ULX2S open source FPGA development boards. The boards use Lattice parts that are capable of being programmed using the reverse engineered prjtrellis and icestorm toolchains, respectively. This addition will allow Nix users to program their devices after generating FPGA bitstreams using the tools described above (both are already packaged in NIx).

Things done

• Tested using sandboxing (nix.useSandbox on NixOS, or option sandbox in nix.conf on non-NixOS linux)
• Built on platform(s)
  • NixOS
  • macOS
  • other Linux distributions
• Tested via one or more NixOS test(s) if existing and applicable for the change (look inside nixos/tests)
• Tested compilation of all pkgs that depend on this change using nix-shell -p nixpkgs-review --run "nixpkgs-review wip"
• Tested execution of all binary files (usually in ./result/bin/)
• Determined the impact on package closure size (by running nix path-info -S before and after)
• Ensured that relevant documentation is up to date
• Fits CONTRIBUTING.md.