see:
https://github.com/bytecodealliance/wasm-micro-runtime/blob/main/build-scripts/lldb-wasm.patch
https://github.com/bytecodealliance/wasm-micro-runtime/blob/main/doc/source_debugging.md
build-lldb.tgz is a build directory for macOS
build-lldb.tar.xz is a build directory for ubuntu. kindly provided by my colleague.
lldb-only-*.tar.gz only contain lldb binaries, extracted from the above files.