Use crosstool-ng as an external toolchain

Some manual steps to set up a crosstool-ng compiler. Also modify the
config to use the external toolchain
Added python
uwsgi: initial skeleton

A skeleton/placeholder for uwsgi support
First successful build

- Several toolchain options changed to be able to compile uwsgi
- uwsgi makefile added
- enable jit on pcre
- added dependencies to uwsgi
- spinning up a qemu to try the machine