bpo-38353: Fix compiler warning in pycore_initconfig.h

[vstinner]

Use "_PyRuntimeState" with "struct pyruntimestate" to avoid a warning
on typedef re-definition.

https://bugs.python.org/issue38353

[bedevere-bot]

⚠️⚠️⚠️ Buildbot failure ⚠️⚠️⚠️

Hi! The buildbot AMD64 Windows10 3.x has failed when building commit c515b57.

What do you need to do:

1. Don't panic.
2. Check the buildbot page in the devguide if you don't know what the buildbots are or how they work.
3. Go to the page of the buildbot that failed (https://buildbot.python.org/all/#builders/3/builds/3617) and take a look at the build logs.
4. Check if the failure is related to this commit (c515b57) or if it is a false positive.
5. If the failure is related to this commit, please, reflect that on the issue and make a new Pull Request with a fix.

You can take a look at the buildbot page here:

https://buildbot.python.org/all/#builders/3/builds/3617

Failed tests:

• test_regrtest

Summary of the results of the build (if available):

== Tests result: FAILURE then SUCCESS ==

389 tests OK.

10 slowest tests:

• test_mmap: 6 min
• test_io: 4 min
• test_largefile: 2 min 55 sec
• test_multiprocessing_spawn: 2 min 52 sec
• test_tools: 2 min 49 sec
• test_tokenize: 2 min 18 sec
• test_concurrent_futures: 1 min 44 sec
• test_unicodedata: 1 min 22 sec
• test_lib2to3: 1 min 17 sec
• test_asyncio: 1 min 10 sec

30 tests skipped:
test_curses test_dbm_gnu test_dbm_ndbm test_devpoll test_epoll
test_fcntl test_fork1 test_gdb test_grp test_ioctl test_kqueue
test_multiprocessing_fork test_multiprocessing_forkserver test_nis
test_openpty test_ossaudiodev test_pipes test_poll test_posix
test_pty test_pwd test_readline test_resource test_spwd
test_syslog test_threadsignals test_wait3 test_wait4
test_xxtestfuzz test_zipfile64

1 re-run test:
test_regrtest

Total duration: 27 min 35 sec

Click to see traceback logs

Traceback (most recent call last):
  File "D:\buildarea\3.x.bolen-windows10\build\lib\test\support\__init__.py", line 336, in _force_run
    return func(*args)
PermissionError: [WinError 32] The process cannot access the file because it is being used by another process: 'D:\\buildarea\\3.x.bolen-windows10\\build\\build\\test_python_9260\\test_python_worker_11168'


Traceback (most recent call last):
  File "D:\buildarea\3.x.bolen-windows10\build\lib\runpy.py", line 192, in _run_module_as_main
    return _run_code(code, main_globals, None,
  File "D:\buildarea\3.x.bolen-windows10\build\lib\runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "D:\buildarea\3.x.bolen-windows10\build\lib\test\__main__.py", line 2, in <module>
    main()
  File "D:\buildarea\3.x.bolen-windows10\build\lib\test\libregrtest\main.py", line 712, in main
    Regrtest().main(tests=tests, **kwargs)
  File "D:\buildarea\3.x.bolen-windows10\build\lib\test\libregrtest\main.py", line 634, in main
    self._main(tests, kwargs)
  File "D:\buildarea\3.x.bolen-windows10\build\lib\contextlib.py", line 131, in __exit__
    self.gen.throw(type, value, traceback)
  File "D:\buildarea\3.x.bolen-windows10\build\lib\test\support\__init__.py", line 1101, in temp_cwd
    yield cwd_dir
  File "D:\buildarea\3.x.bolen-windows10\build\lib\contextlib.py", line 131, in __exit__
    self.gen.throw(type, value, traceback)
  File "D:\buildarea\3.x.bolen-windows10\build\lib\test\support\__init__.py", line 1054, in temp_dir
    rmtree(path)
  File "D:\buildarea\3.x.bolen-windows10\build\lib\test\support\__init__.py", line 458, in rmtree
    _rmtree(path)
  File "D:\buildarea\3.x.bolen-windows10\build\lib\test\support\__init__.py", line 399, in _rmtree
    _waitfor(_rmtree_inner, path, waitall=True)
  File "D:\buildarea\3.x.bolen-windows10\build\lib\test\support\__init__.py", line 347, in _waitfor
    func(pathname)
  File "D:\buildarea\3.x.bolen-windows10\build\lib\test\support\__init__.py", line 396, in _rmtree_inner
    _force_run(fullname, os.rmdir, fullname)
  File "D:\buildarea\3.x.bolen-windows10\build\lib\test\support\__init__.py", line 342, in _force_run
    return func(*args)
PermissionError: [WinError 32] The process cannot access the file because it is being used by another process: 'D:\\buildarea\\3.x.bolen-windows10\\build\\build\\test_python_9260\\test_python_worker_11168'


Traceback (most recent call last):
  File "D:\buildarea\3.x.bolen-windows10\build\lib\test\support\__init__.py", line 1049, in temp_dir
    yield path
  File "D:\buildarea\3.x.bolen-windows10\build\lib\test\support\__init__.py", line 1101, in temp_cwd
    yield cwd_dir
  File "D:\buildarea\3.x.bolen-windows10\build\lib\test\libregrtest\main.py", line 634, in main
    self._main(tests, kwargs)
  File "D:\buildarea\3.x.bolen-windows10\build\lib\test\libregrtest\main.py", line 707, in _main
    sys.exit(0)
SystemExit: 0