Add aburi compiler

[likecrazy1]

compiler-explorer/compiler-explorer#8871

[mattgodbolt-molty]

Thanks @likecrazy1! Picking up the build path for this. Two enabling fixes were needed before the aburi-atta-mills artifact this installable points at can be built and uploaded to S3:

1. aburi: install x86_64 cmake, not aarch64 misc-builder#137 — Dockerfile.aburi fetched the aarch64 cmake; the builder runs on x86_64, so the compiler build would fail at cmake. Fixed to x86_64.
2. bespoke-build: add aburi to builder image choices #2209 — aburi wasn't a selectable image in bespoke-build, so the artifact build couldn't be dispatched. Added it.

Once both merge (and the aburi-builder image rebuilds), I'll run bespoke-build -f image=aburi -f version=atta-mills -f command=build.sh to populate S3, after which this PR and compiler-explorer/compiler-explorer#8872 are unblocked.

[github-actions]

Build Required

The following additions require CE to build artifacts before deployment:

• cpp.yaml: compilers/c++/aburi atta-mills (type: s3tarballs)

Please ensure these have been built and uploaded to S3 before merging, or coordinate with the CE team.

Build Commands

gh workflow run bespoke-build.yaml -f image=aburi -f version=atta-mills -f command=build.sh

[mattgodbolt-molty]

Pushed a maintainer edit removing the duplicate. The aburi: installable was defined identically in both c.yaml and cpp.yaml — both resolve to the same S3 artifact and the same install path (/opt/compiler-explorer/aburi/atta-mills), so it was one physical install described twice. Not harmful (the second is skipped as already-installed), just redundant/confusing. Kept it in cpp.yaml (gcc/clang convention); the C and C++ property groups in compiler-explorer#8872 both point at the same exe, so C is unaffected.

Verified end-to-end with a real local install:

bin/ce_install --dest ~/ce-test install 'compilers/c++/aburi'
→ 1 packages installed OK, 0 skipped, 0 failed
bin/aburi --version → Aburi 0.1.1-republic-day / LLVM 18.1.8 / aarch64-apple-darwin (exit 0)

So the installable is good to go. 👍