[S] Change in coreboot[master]: util/crossgcc: Limit LLVM targets to the needed ones

[Arthur Heymans (Code Review)]

Attention is currently required from: Felix Singer, Arthur Heymans, Martin L Roth, Patrick Georgi.

Arthur Heymans has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/69841 )

Change subject: util/crossgcc: Limit LLVM targets to the needed ones
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Patch Set 1:

(1 comment)

Patchset:

PS1:
> Seems not really necessary to me since the Clang toolchain includes all architectures. Also, the Clang toolchain uses more than 3GB disk space. That's a lot compared to what a GCC toolchain needs.

The clang toolchain we build is much more featureful than the bare metal only gcc we build. Limiting target arch is a nice start. Do you have some metrics?