- disable build of rusticl on sle15; meson is just too old ...

- buildrequires: rusticl needs mesa >= 1.4.0

- tlsdesc_test.patch: disable LTO in tlsdesc_test to suppress TLS
relaxation (patch by Andreas Schwab ); see also
https://gitlab.freedesktop.org/mesa/mesa/-/issues/11929

- buildrequire llvm19-devel/clang19-devel on sle15-sp7

- Add u_fix-llvm19-build.patch to fix build with LLVM 19 on ARM.
- Update minimum version requirements based on meson.build.
- Fix build on s390x: apparently we don't have libvdpau_gallium.so.

- drop U_egl-x11-sw-fix-partial-image-uploads.patch:
the code in the function saw further fixes later on in the 24.2
branch.

- integrated changes by Andreas Schwab
* enable glamor also for driver build
* update rust crates
+ syn 2.0.39
+ proc_macro2 1.0.86
* enable valgrind also on riscv64
* added libvdpau_gallium package for generic VDPAU state tracker
* switch from "swrast" to "softpipe,llvmpipe" drivers
* use "-Dllvm-orcjit=true" for riscv64 build
* added libgallium to Mesa-dri package

- re-disable llvm for non-driver build by switching from "swrast"
to "softpipe" for gallium drivers in that case
- make previous changelog a bit nicer

- Update to release 24.2.2
--> https://docs.mesa3d.org/relnotes/24.2.2
--> https://docs.mesa3d.org/relnotes/24.2.1
--> https://docs.mesa3d.org/relnotes/24.2.0
- refreshed the following patches with quilt:
* U_fix-mpeg1_2-decode-mesa-20.2.patch
* n_add-Mesa-headers-again.patch
* n_stop-iris-flicker.patch
* u_dep_xcb.patch
* u_fix_rust_bindgen.patch
- dropped U_radeonsi-vcn-Add-decode-DPB-buffers-as-CS-dependency.patch
- New BuildRequires:
* python3-PyYAML
- enable llvm also for non-driver build to fix:
"llvmpipe requires LLVM and is enabled, but LLVM is disabled".