Build kelvin_v2 toolchain in Rock linux

The following instructions describe how to build and export a toolchain for kelvin_v2

Build and run docker image

$ docker build --no-cache -t toolchain_test -f toolchain_rockylinux_image.dockerfile .

open toolchain_test container in interactive mode and mount current directory

$ docker run -v `pwd`:/toolchain/build_scripts -w /toolchain/build_scripts toolchain_test bash kelvin_v2_toolchain_build.sh

Output toolchain artifacts will be exported to rv32_out