python3: Fix building C extensions with setuptools

python3: Fix building C extensions with setuptools

setuptools provides a local copy of distutils and when building a C
extension, this distutils will add the target LIBDIR (/usr/lib) to the
list of library paths.

If the build system has a libpython3.11.so in /usr/lib, then the linker
will try to link to this shared library and fail.

This adapts 008-distutils-use-python-sysroot.patch for host setuptools
to add the correct library directory.

Fixes: https://github.com/openwrt/packages/issues/22330
Signed-off-by: Jeffery To <jeffery.to@gmail.com>