On the Windows x86 platform we saw a large performance
degradation when using multiple threads for the
generate_breakpad_symbols target. If we run it single
threaded instead it runs in less than two minutes
vs. over two hours multi-threaded.
Also add elapsed time taken for each symbol file generated.
Python GIL info has been added to the
[devops wiki](https://github.com/brave/devops/wiki/Python-GIL).
Fixes: https://github.com/brave/devops/issues/889