[issue21311] Fix compiler detection when brew's ccache is installed on Mac OS X

[Roundup Robot]

Roundup Robot added the comment:

New changeset e3217efa6edd by Ned Deily in branch '2.7':
Issue #21311: Avoid exception in _osx_support with non-standard compiler
http://hg.python.org/cpython/rev/e3217efa6edd

New changeset 3d1578c705c9 by Ned Deily in branch '3.4':
Issue #21311: Avoid exception in _osx_support with non-standard compiler
http://hg.python.org/cpython/rev/3d1578c705c9

New changeset 2a4401109672 by Ned Deily in branch 'default':
Issue #21311: merge with 3.4
http://hg.python.org/cpython/rev/2a4401109672

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nosy: +python-dev

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<http://bugs.python.org/issue21311>
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