llambda.lisp on linux

A developer incorporated patches from a reader named Madhu that enable llambda.lisp, a Lisp-based inference project, to run on Linux. The patch uses mmap to load model weights into the Lisp address space outside the heap and adds default values for a Hugging Face model. Madhu reported successful inference on his Linux machine after about an hour of hacking, and the updates have been pushed to GitHub.