[issue17667] Windows: build with "build_pgo.bat -2" fails to optimize python.dll

[Terry J. Reedy]

Changes by Terry J. Reedy <tjreedy at udel.edu>:


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nosy: +brian.curtin, tim.golden
stage:  -> patch review

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue17667>
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