MR50: Upgrade cffi to 1.14.4

[sagetrac-gitlab-bot]

zlscherr (@zlscherr) opened a merge request at https://gitlab.com/sagemath/sage/-/merge_requests/50:

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Currently, cffi 1.14.3 fails to build with homebrew python 3.9 on
Mac OSX Big Sur, see the comments in [https://groups.google.com/g/sage-release/c/1rJF7CzEksY](https://groups.google.com/g/sage-release/c/1rJF7CzEksY).
This error has been fixed in cffi 1.14.4.  As per usual you can configure with

./configure --enable-download-from-upstream-url

to download from pypi.

Component: build

Author: Zachary Scherr

Branch/Commit: f7d1ed5

Reviewer: Matthias Koeppe

Issue created by migration from https://trac.sagemath.org/ticket/31128

[zlscherr]

Description changed:

[mkoeppe]

Reviewer: Matthias Koeppe

[mkoeppe]

Changed author from zlscherr to Zachary Scherr

[vbraun]

Changed branch from u/galois/mrs/50/upgrade_cffi_1.14.4 to f7d1ed5