Co-Authored-By: Thomas Hisch <thomas.hisch@ims.co.at>

Fixes #2394

Extract ppc patch

Adding changes to support PPC64LE

Apply docs revamp

Enable flake8 and cov plugins only when installed.

Add fallback for the situation where distutils.ccompiler.CCompiler.spawn has been patched. Fixes pypa/distutils#15.

Merge pull request #2381 from pypa/bugfix/2355-keep-distutils-patched-when-pip-imported-during-build

When pip is imported as part of a build, leave distutils patched.

Reduce size of setuptools' bdist_rpm._make_spec_file

There are some setuptools specific changes in the bdist_rpm module that
are no longer needed, because the upstream/shipped version of distutils
already contains them. The code that is removed in this commit from
bdist_rpm is already part of the python-3.5 version of distutils.

Related: #2377

Restoring mis-placed comment, added comment for PPC64LE specific permission fix and reduced number of jobs for the same platform.