[issue8089] 2.6/3.1 32-bit/64-bit universal builds always run in 64-bit on 10.6

[Ned Deily]

Changes by Ned Deily <nad at acm.org>:


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versions: +Python 3.1 -Python 2.6

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue8089>
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