This change upgrades the version of lxml to 4.3.0.
Run-tested on an x86 VM.

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

Switched URL to the standard pythonhosted one. The website directs users there.

Tarballs are identical.

Signed-off-by: Rosen Penev <rosenp@gmail.com>

Version 4.2.4 has been released recently.
Update it.

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

Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>

This guarantees for the package feeds that
the mk files will always be available for all packages.

Will need to see about external-feed Python packages
a bit later.

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

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

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

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

And depend on python-light only if python-lxml is selected.
Same thing for python3-lxml.

Otherwise, this builds both Python & Python3 intepreters.

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

This package requires libxml2 & libxslt to be built, has some
C code so it's not installable via pip.
It needs cross-compilation.

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