python3: upgrade 3.8.4 -> 3.8.5

python3: upgrade 3.8.4 -> 3.8.5

Release Date: July 20, 2020

Note: The release you're looking at is Python 3.8.5, a bugfix release for the
legacy 3.8 series. Python 3.9 is now the latest feature release series of
Python 3.

Drop patches fixed in 3.8.5:
- CVE-2019-20907
- CVE-2019-26116

References:
https://nvd.nist.gov/vuln/detail/CVE-2019-20907
https://nvd.nist.gov/vuln/detail/CVE-2020-26116
https://www.python.org/downloads/release/python-385/
https://docs.python.org/release/3.8.5/whatsnew/changelog.html#changelog

Signed-off-by: Tim Orling <timothy.t.orling@intel.com>
Signed-off-by: Steve Sakoman <steve@sakoman.com>