[RFC] Bump minimum Python version to 3.4

[Kevin Buettner]

On Fri,  2 Jun 2023 10:33:03 -0600
Tom Tromey via Gdb-patches <gdb-patches@sourceware.org> wrote:

> While looking into the f-string issue, I noticed that the README
> documents 3.2 as the minimum Python version, while gdb.texinfo says
> 3.0.2.  Asking on irc, I found out that SuSE's "LTS" ships 3.4, and
> RHEL 7 ships 3.6.  Based on this I think it's reasonable to bump the
> minimum required version to 3.4.

I'm in favor of this change.

The patch LGTM also.

Kevin