Fixes:
https://github.com/openwrt/packages/issues/5318

Not sure how this worked before.
The host python-cffi needs a libffi installed on the host side.

Signed-off-by: Alexandru Ardelean <ardeleanalex@gmail.com>

Signed-off-by: Alexandru Ardelean <ardeleanalex@gmail.com>

Signed-off-by: Alexandru Ardelean <ardeleanalex@gmail.com>

python-cryptography needs this dep to build
the sources.

Signed-off-by: Alexandru Ardelean <ardeleanalex@gmail.com>

And drop the host-build.
This was needed, simply to cross-build the package.

I'm not a religious man, but "praise the lord" for
dropping this :D

Signed-off-by: Alexandru Ardelean <ardeleanalex@gmail.com>

I admit this may be be a bit aggressive, but the lang
folder is getting cluttered/filled up with Python, PHP, Perl,
Ruby, etc. packages.

Makes sense to try to group them into per-lang folders.

I took the Pythons.

Signed-off-by: Alexandru Ardelean <ardeleanalex@gmail.com>