bug#43492: [PATCH] doc: fix broken links.

[Leo Famulari]

On Fri, Sep 18, 2020 at 12:32:36PM -0400, Greg Hogan wrote:
> Links are broken for "tracked by our build farm" at
>     https://guix.gnu.org/manual/en/html_node/Submitting-Patches.html
> and for "our continuous integration system" at
>     https://guix.gnu.org/manual/en/html_node/Packaging-Guidelines.html
> 
> From 313c2d7f39752452766ba1eed5dfa1848ae0bd79 Mon Sep 17 00:00:00 2001
> From: Greg Hogan <code@greghogan.com>
> Date: Fri, 18 Sep 2020 16:23:26 +0000
> Subject: [PATCH] doc: fix broken links.
> 
> * doc/contributing.texi
> (Packaging Guidelines): change URL from relative to absolute link.
> (Submitting Patches): change URL from relative to absolute link.

Thanks! I tweaked the commit message and pushed as
aa9ba865deadf8b95c629daca6e57eb4f3edefbe