[3.8] bpo-39562: Prevent collision of future and compiler flags (GH-19230) by pablogsal · Pull Request #19835 · python/cpython

…onGH-19230)

The constant values of future flags in the __future__ module
is updated in order to prevent collision with compiler flags.
Previously PyCF_ALLOW_TOP_LEVEL_AWAIT was clashing
with CO_FUTURE_DIVISION..
(cherry picked from commit 4454057)

Co-authored-by: Batuhan Taşkaya <batuhanosmantaskaya@gmail.com>