[issue1298835] Add a vendor-packages directory for system-supplied modules

[Éric Araujo]

Changes by Éric Araujo <merwok at netwok.org>:


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components: +Interpreter Core -Distutils2, Library (Lib)
versions: +Python 3.4 -Python 3.3

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue1298835>
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