[issue26689] Add `has_flag` method to `distutils.CCompiler`

[SilentGhost]

Changes by SilentGhost <ghost.adh at runbox.com>:


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stage:  -> patch review
versions:  -Python 3.2, Python 3.3, Python 3.4, Python 3.5

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue26689>
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