message: [lldb] Fix ninja URL
  The old URL is a 404 now. Pointed out by Smirftsch1 on IRC.
diff: versions of Python can be made to work by compiling your own distribution from source,
  but this workflow is unsupported and you are own your own.
  </li>
  - <li><a href="http://martine.github.io/ninja/">Ninja build tool</a> (strongly recommended)</li>
  + <li><a href="https://ninja-build.org/">Ninja build tool</a> (strongly recommended)</li>
  <li><a href="http://gnuwin32.sourceforge.net/">GnuWin32</a></li>
  <li><a href="http://www.swig.org/download.html">SWIG for Windows (version 3+)</a></li>
  </ul>
  