[Bug 49126] New: wine-gecko fails to build on host systems with python 3.8

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=49126

Bug ID: 49126
           Summary: wine-gecko fails to build on host systems with python
                    3.8
           Product: Wine-gecko
           Version: unspecified
          Hardware: x86
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: wine-gecko-unknown
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: ---

Created attachment 67122
  --> https://bugs.winehq.org/attachment.cgi?id=67122
Fix (minus the needed pip update)

Various python scripts in wine-gecko use functions that have been removed in
python 3.8.x:

platform.linux_distribution() in build/mach_bootstrap.py,
python/mozboot/mozboot/bootstrap.py,
testing/mozbase/mozinfo/mozinfo/mozinfo.py,
testing/mozharness/mozinfo/mozinfo.py and
media/webrtc/trunk/tools/gyp/gyptest.py (probably the last one isn't actually
used)

time.clock() in python/mozbuild/mozbuild/config_status.py

Furthermore, the version of pip that's bundled in
python/virtualenv/virtualenv_support/pip-8.0.2-py2.py3-none-any.whl uses
platform.linux_distribution() as well. This is fixable by replacing this file
with current upstream pip,
https://files.pythonhosted.org/packages/54/2e/df11ea7e23e7e761d484ed3740285a...

The replacement for platform.linux_distribution() needs the distro module
pulled in, so the virtualenv config needs to be updated as well.

Attaching a patch that fixes the issues except the pip update (binary files
don't go well with patch files...)