Merged revisions 81004 via svnmerge from

svn+ssh://pythondev@svn.python.org/python/trunk

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  r81004 | mark.dickinson | 2010-05-08 14:13:21 -0500 (Sat, 08 May 2010) | 1 line

  Fix configure bug that was misreporting availability of MacOS X 10.5 SDK as available on Linux but not on OS X.
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