[issue36656] Please add race-free os.link and os.symlink wrapper / helper

[Tal Einat]

Change by Tal Einat <taleinat at gmail.com>:


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components: +Library (Lib)
versions: +Python 3.9 -Python 3.7

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue36656>
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