Moderate: python3 security and bug fix update (Oracle Linux 8)

[3.6.8-31.0.1]
- Add Oracle Linux distribution in platform.py [Orabug: 20812544]

[3.6.8-31]
- Avoid infinite loop when reading specially crafted TAR files (CVE-2019-20907)
Resolves: rhbz#1856481
- Resolve hash collisions for Pv4Interface and IPv6Interface (CVE-2020-14422)
Resolves: rhbz#1854926

[3.6.8-30]
- Remove downstream 00178-dont-duplicate-flags-in-sysconfig.patch which
introduced a bug on distutils.sysconfig.get_config_var('LIBPL')
(rhbz#1851090).

[3.6.8-29]
- Fix python3-config --configdir (rhbz#1772992).

[3.6.8-28]
- Security fix for CVE-2020-8492
Resolves: rhbz#1810618

[3.6.8-27]
- Add a sentinel value on the Hmac_members table of the fips compliant hmac module
Resolves: rhbz#1800512

[3.6.8-26]
- Skip test_startup_imports from test_site if we have a .pth file in sys.path
Resolves: rhbz#1814392

[3.6.8-25]
- Security fix for CVE-2019-16935
Resolves: rhbz#1798001

[3.6.8-24]
- Build Python with -fno-semantic-interposition for better performance
- https://fedoraproject.org/wiki/Changes/PythonNoSemanticInterpositionSpeedup
- Also fix test_gdb failures with Link Time Optimizations
Resolves: rhbz#1724996