Package rusticl as rusticl-opencl-icd

Mesa provides a new OpenCL implementation called rusticl; written in Rust. It is a modern alternative to the "Clover" OpenCL implementation. To be clear, Rust is only required during the build process, the final libraries do not need the Rust runtime.

Package rusticl in parallel to the Clover implementation such that we can ship the driver to users who explicitly install it.

Signed-off-by: Christopher Obbard chris.obbard@collabora.com