[issue22636] avoid using a shell in ctypes.util: replace os.popen with subprocess

[Roundup Robot]

Roundup Robot added the comment:

New changeset 0715d403cae2 by Martin Panter in branch '3.5':
Issue #22636: avoid using a shell in the ctypes.util module
https://hg.python.org/cpython/rev/0715d403cae2

New changeset 60613ecad578 by Martin Panter in branch 'default':
Issue #22636: Merge ctypes.util shell injection fixes from 3.5
https://hg.python.org/cpython/rev/60613ecad578

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nosy: +python-dev

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