Merged revisions 74798 via svnmerge from

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

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  r74798 | ronald.oussoren | 2009-09-15 20:33:33 +0200 (Tue, 15 Sep 2009) | 8 lines

  MacOSX: detect the architectures supported by
  Tk.framework and build _tkinter only for those
  architectures.

  This replaces the hardcoded solution that is no
  longer valid now that 64-bit capable versions of
  Tk are available on OSX.
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