Merged revisions 76813 via svnmerge from

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

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  r76813 | mark.dickinson | 2009-12-13 21:06:06 +0000 (Sun, 13 Dec 2009) | 3 lines

  Issue #7492: Autoconf tests were leaving semaphore files behind.  Add
  sem_unlink calls to delete those semaphore files.
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