Cross-Compiling Python for Mungi

These are really for my own reference and a reminder to write some real documentation when this actually becomes possible and maintainable. Python is difficult to cross-compile because compiled parts of the source are used to generate the rest of the source - my goal is to make that a little easier than it currently is

Firstly, these notes are heavily based off http://www.ailis.de/~k/knowledge/crosscompiling/python.php, which is a cross-compilation tutorial for Python on ARM.

The major problem is that Python compiles first pgen and then python, both of which are used as part of the compilation process later on.