[util,toolchain] Download toolchain architecture specific #28443
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Newer releases of the lowRISC maintained RISC-V toolchain contain builds for different architectures whereas older releases targeted only one architecture.
This change adds a switch to the
util/get-toolchain.py
script to select the desired architecture.I opted for a manual architecture selection and chose
x86_64
as default architecture. Is there a need to add an automatic architecture detection (i.e., somehow detecting the architecture of the host calling the script)?This closes #26575.