[3.14] GH-139914: Handle stack growth direction on HPPA (GH-140028)

[stefanor]

Adapted from a patch for Python 3.14 submitted to the Debian BTS by John David Anglin https://bugs.debian.org/1105111#20

• Issue: Python 3.14 fails to build on hppa, error indicates stack overflow (false positive?) #139914

[StanFromIreland]

Marking as DO-NOT-MERGE as the main PR has not yet been merged.

[stefanor]

This is now mergeable.

[StanFromIreland]

Please fix the warning causing the CI to fail: https://github.com/python/cpython/actions/runs/19303215688/job/55203254605?pr=141404

[stefanor]

Err, how on earth did that ever compile? Testing again...

[stefanor]

Yeah, looks fine.

[bedevere-bot]

🤖 New build scheduled with the buildbot fleet by @encukou for commit a26fcc3 🤖

Results will be shown at:

https://buildbot.python.org/all/#/grid?branch=refs%2Fpull%2F141404%2Fmerge

If you want to schedule another build, you need to add the 🔨 test-with-buildbots label again.

[hugovk]

Buildbots have passed.

"buildbot/iOS ARM64 Simulator PR" shows as "Waiting for status to be reported — Build started" but has completed and passed at https://buildbot.python.org/#/builders/1382/builds/739.