Done, along with an update to 18.3.5.

On Mon, 18 Mar 2019 17:50:07 +0100
Marius Bakke <mbakke@fastmail.com> wrote:

> Rutger Helling <rhelling@mykolab.com> writes:
> 
> > I think you're right! Changing mesa from a regular input to a
> > propogated one seems to have fixed all the issues for SDL. I no
> > longer need patches 3-6. See below for what we can use instead. Can
> > I push the patches now?  
> 
> Well, we still don't know *why* it is needed :-)
> 
> Could you add a comment about where it comes from (e.g. pkg-config or
> the .la files) and squash this commit with the Mesa patch?  LGTM with
> that change, thanks!