[SSSD] [sssd PR#5495][synchronized] Fix python headers detection with recent autoconf (Fixes #5336)

[mtorromeo]

   URL: https://github.com/SSSD/sssd/pull/5495
Author: mtorromeo
 Title: #5495: Fix python headers detection with recent autoconf (Fixes #5336)
Action: synchronized

To pull the PR as Git branch:
git remote add ghsssd https://github.com/SSSD/sssd
git fetch ghsssd pull/5495/head:pr5495
git checkout pr5495