Refreshed Python patches.
Updated pip & setuptools version.
For pip, patch '001-pep517-pyc-fix.patch' was reworked.
Also, the current version of the bundled pip (21.1.1) no longer supports
Python2, so the 'py2.py3' suffix gets replaced with just py3.
For setuptools, there is no longer a script/module:
https://github.com/pypa/setuptools/pull/2544
Signed-off-by: Alexandru Ardelean <ardeleanalex@gmail.com>