python3: Revert python-config to distutils.sysconfig

python3: Revert python-config to distutils.sysconfig

The newer sysconfig module shares some code with distutils.sysconfig,
but the same modifications as in

12-distutils-prefix-is-inside-staging-area.patch

makes distutils.sysconfig affect the native runtime as well as cross
building.  Use the old, patched implementation which returns paths in
the staging directory and for the target, as appropriate.

This change reverts this upstream patch
http://hg.python.org/cpython/diff/712970b019f7/Misc/python-config.in

(From OE-Core rev: 7b2ffd68ae8235dcc3ddff9cbe8525e61f3b3d28)

Signed-off-by: Tyler Hall <tylerwhall@gmail.com>
Signed-off-by: Saul Wold <sgw@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>