[issue33355] Windows 10 buildbot: 15 min timeout on test_mmap.test_large_filesize()

[Ned Deily]

Change by Ned Deily <nad at python.org>:


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nosy: +paul.moore, steve.dower, tim.golden, zach.ware
priority: normal -> deferred blocker

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue33355>
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