sage-bootstrap-python: Prefer pythons that support ssl with SNI

[mkoeppe]

(from #32372 comment:10)

This fixes the problem on ubuntu-trusty-standard (https://github.com/mkoeppe/sage/runs/4128487418?check_suite_focus=true), which fails to download from upstream_url that points to pypi.io

CC: @fchapoton @slel @sagetrac-tmonteil @jhpalmieri @kliem

Component: build

Author: Matthias Koeppe

Branch/Commit: 48b7927

Reviewer: Jonathan Kliem

Issue created by migration from https://trac.sagemath.org/ticket/32405

[slel]

Description changed:

[mkoeppe]

Branch: u/mkoeppe/sage_bootstrap_python__reject_ancient_pythons_that_do_not_support_sni

[mkoeppe]

Description changed:

--- 
+++ 
@@ -1,3 +1,5 @@
 (from [#32372 comment:10](https://github.com/sagemath/sage/issues/32372#comment:10))
 
+This fixes the problem on `ubuntu-trusty-standard` (https://github.com/mkoeppe/sage/runs/4128487418?check_suite_focus=true), which fails to download from `upstream_url` that points to `pypi.io`
 
+

[mkoeppe]

Commit: 48b7927

[mkoeppe]

Author: Matthias Koeppe

[mkoeppe]

New commits:

48b7927

build/bin/sage-bootstrap-python: Prefer a Python that provides ssl with SNI

[mkoeppe]

comment:4

Let's get this in please

[kliem]

Reviewer: Jonathan Kliem

[kliem]

comment:5

LGTM.

[mkoeppe]

comment:6

Thank you!

[vbraun]

Changed branch from u/mkoeppe/sage_bootstrap_python__reject_ancient_pythons_that_do_not_support_sni to 48b7927