[bug#64369] bug#64738: [PATCH] gnu: Make Mesa use zstd compression for shader cache instead of zlib.

[宋文武]

>
>     gnu: mesa: Enable zstd compression for shader cache.
>     
>     * gnu/packages/gl.scm (mesa)[inputs]: Add zstd:lib.
>     [arguments]: Add '-Dzstd=enabled' to configure-flags.

Pushed to the mesa-updates branch, merging progress tracked in
https://issues.guix.gnu.org/64369.

Thanks.