mesa-git build script for latest panfrost

[Jeremiah Cornelius]

@xmixahlx Thanks for your effort in this!
Success with my build on @danielt stock arch64 Bullseye. Using your minimal lines for config knocked out the pesky dependencies for nVidia and unused external integrations.

I found that I didn't have a whole X11 development installation, and that the arm64 build from debbootstrap left out some Python3 goodies that I thought were covered. I can supply those as dependency checks, if you like.

First impressions are it's VERY snappy now. Switching to the Gnome3 overview is crisper and use of a transparent terminal Gnome Extension renders very smooth and quickly. My page-tearing when scrolling a full-screen Firefox goes away. Anecdotally, this is a number  of great improvements, if not a formal benchmark.

A+

definitely please share any steps needed for the script to work as intended. others will benefit. glad this is working so well for you.

The deps required by any good build environment, not included in build-essential are:
bison
flex

Missing Python deps from a base install are:
python3-setuptools
python3-mako

X11 and Wayland build dependencies are:
wayland-protocols
wayland-dev
libx11-dev
xorg-dev

The last two meta-packages include a large number of libraries that would have to be tracked as some dozen or much more individual dependencies.

Because most users are starting with a debbootstrap and a couple simple tasksel items, plugging these holes should get them off the ground!