python3: Add a fix for a make install race

Add a fix for reproducibility issues where pyc files for python-config.py
may not always be generated.

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
(cherry picked from commit d1c3a87c)
Signed-off-by: Anuj Mittal <anuj.mittal@intel.com>