[3.11] gh-94801: Fix regression in configure's CPPFLAGS handling (GH-95288)#95297

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ambv merged 1 commit intopython:3.11from

tiran:backport-9af7f87-3.11

Jul 27, 2022

Commits on Jul 26, 2022

[3.11] gh-94801: Fix regression in configure's CPPFLAGS handling (GH-95288).
tiran
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