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>

When cross-compiling, we do not need to add runtime lib dirs.
Also, the cross compilers that are used on OpenWRT do not support
the '-R' option, which causes build failures.

These build failures existed before, but were not noticed,
because it fails only on some setups.
This is because Python's `setup.py` does a lot of voo-doo
automagic that needs handling for some cross-compilation cases.

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