C67: use system python for update-external-binaries.py

[ltilve]

We are hitting a SSL problem while running npm run init just on our Windows envs at https://git.igalia.com/chromium/muon/src/master/script/update-external-binaries.py#L61

  File "src/electron/script/update-external-binaries.py", line 66, in <module>
  File "src/electron/script/update-external-binaries.py", line 32, in main
  File "src/electron/script/update-external-binaries.py", line 50, in download_and_unzip
  File "src/electron/script/update-external-binaries.py", line 61, in download_framework
  File "c:\buildbot\bbot-master\chromium_brave_win64\build\src\electron\script\lib\util.py", line 81, in download
    web_file = urllib2.urlopen(url)
  File "c:\buildbot\bbot-master\chromium_brave_win64\build\src\third_party\depot_tools\win_tools-2_7_6_bin\python\bin\lib\urllib2.py", line 127, in urlopen
    return _opener.open(url, data, timeout)
  File "c:\buildbot\bbot-master\chromium_brave_win64\build\src\third_party\depot_tools\win_tools-2_7_6_bin\python\bin\lib\urllib2.py", line 410, in open
    response = meth(req, response)
  File "c:\buildbot\bbot-master\chromium_brave_win64\build\src\third_party\depot_tools\win_tools-2_7_6_bin\python\bin\lib\urllib2.py", line 523, in http_response
    'http', request, response, code, msg, hdrs)
  File "c:\buildbot\bbot-master\chromium_brave_win64\build\src\third_party\depot_tools\win_tools-2_7_6_bin\python\bin\lib\urllib2.py", line 442, in error
    result = self._call_chain(*args)
  File "c:\buildbot\bbot-master\chromium_brave_win64\build\src\third_party\depot_tools\win_tools-2_7_6_bin\python\bin\lib\urllib2.py", line 382, in _call_chain
    result = func(*args)
  File "c:\buildbot\bbot-master\chromium_brave_win64\build\src\third_party\depot_tools\win_tools-2_7_6_bin\python\bin\lib\urllib2.py", line 629, in http_error_302
    return self.parent.open(new, timeout=req.timeout)
  File "c:\buildbot\bbot-master\chromium_brave_win64\build\src\third_party\depot_tools\win_tools-2_7_6_bin\python\bin\lib\urllib2.py", line 404, in open
    response = self._open(req, data)
  File "c:\buildbot\bbot-master\chromium_brave_win64\build\src\third_party\depot_tools\win_tools-2_7_6_bin\python\bin\lib\urllib2.py", line 422, in _open
    '_open', req)
  File "c:\buildbot\bbot-master\chromium_brave_win64\build\src\third_party\depot_tools\win_tools-2_7_6_bin\python\bin\lib\urllib2.py", line 382, in _call_chain
    result = func(*args)
  File "c:\buildbot\bbot-master\chromium_brave_win64\build\src\third_party\depot_tools\win_tools-2_7_6_bin\python\bin\lib\urllib2.py", line 1222, in https_open
    return self.do_open(httplib.HTTPSConnection, req)
  File "c:\buildbot\bbot-master\chromium_brave_win64\build\src\third_party\depot_tools\win_tools-2_7_6_bin\python\bin\lib\urllib2.py", line 1184, in do_open
    raise URLError(err)
urllib2.URLError: <urlopen error [Errno 1] _ssl.c:507: error:1407742E:SSL routines:SSL23_GET_SERVER_HELLO:tlsv1 alert protocol version>

We are workarounding it for now setting for those build rules npm run init || ( python src/electron/script/update-external-binaries.py && npm run init) but if it might be interesting to force the usage of the system phyton on every case.

[MaoShultz]

https://github.com/brave/browser-laptop-bootstrap/issues/42

[jonathansampson]

For anybody wondering, the above workaround didn't work for me in Powershell. Instead, I had to use Git Bash to run the command as-is. I did not test Command Prompt.