[Buildroot] Add python module Connexion

[Serhii Sakhno]

I would to add python module Connexion to buildroot. I haven`t problems
with other python modules, but with Connexion (and with logging_tree, if i
right remember) i have same problem.

 >>> python-connexion 2.2.0 Building
buildroot_1  | (cd
/ntc_image/standard/output/build/python-connexion-2.2.0//;
_PYTHON_SYSCONFIGDATA_NAME="_sysconfigdata_m_linux_arm-linux-gnueabihf"
PATH="/ntc_image/standard/output/host/bin:/ntc_image/standard/output/host/sbin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
PYTHONPATH="/ntc_image/standard/output/target/usr/lib/python3.7/"
PYTHONNOUSERSITE=1
_python_sysroot=/ntc_image/standard/output/host/arm-buildroot-linux-gnueabihf/sysroot
_python_prefix=/usr _python_exec_prefix=/usr
/ntc_image/standard/output/host/bin/python setup.py build  )
buildroot_1  | Download error on https://pypi.org/simple/flake8/: unknown
url type: https -- Some packages may not be found!
buildroot_1  | Couldn't find index page for 'flake8' (maybe misspelled?)
buildroot_1  | Download error on https://pypi.org/simple/: unknown url
type: https -- Some packages may not be found!

And now i didn't found problem with ssl.
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