Add xtensa to wamrc build CI

[AlixANNERAUD]

Feature

• Add Xtensa to wamrc build CI.

Benefit

• Avoid long CI runs on projects that depend on WAMR and clunky dependencies.

Implementation

Use build_llvm_xtensa.sh instead of the regular build_llvm.sh in the CI.

Alternatives

None provided.

[lum1n0us]

Not sure but is this https://github.com/bytecodealliance/wasm-micro-runtime/blob/main/.github/workflows/spec_test_on_nuttx.yml what you are looking for?

[AlixANNERAUD]

Ok then, is it possible to upload the build binaries of wamrc (Xtensa version) to the WAMR release? Since published version of wamrc is missing support for xtensa architecture.

[lum1n0us]

If we're talking about putting in a new backend for Xtensa in wamrc, we can certainly do it.