## Why
Native voice libraries need package-relative loader paths so a prepared runtime
can be moved without retaining references to its build prefix.
## What changed
- Configure CMake and GNU Linux Meson builds with relative runtime paths, while
also setting relocatable install names and paths for CMake libraries on macOS.
- Add a GNU Linux runtime preparer for x64 and ARM64 that validates bounded ELF64
metadata, selects the declared GStreamer plugins and dependency closure, and
preserves the `lib/gstreamer-1.0/` layout.
- Reject malformed ELF metadata, path-bearing imports, unsupported loader
dependencies, and native outputs that still contain incompatible runtime
paths.
## Testing
Add native tests for relative build paths, relocated library loading, dependency
and digest failures, malformed ELF inputs, and cleanup after failed preparation.
GitOrigin-RevId: ed94819b07d20214b56363446b64f765e08d75fa
## What changed
- Add a shared runtime preparer that validates native build receipts, source and
file digests, dependency closure, and output containment before copying the
required voice plugins and libraries.
- Add macOS-specific Mach-O inspection and relocation that removes build-time
runpaths, rewrites non-system dependencies relative to each loader, applies
development ad-hoc signatures, and records the resulting payload in
`runtime.json`.
- Close the state runtime explicitly in the clear-memories CLI test.
## Testing
- Add macOS tests covering relocation after the source prefix is removed and
fail-closed handling of invalid receipts, changed inputs, unsafe paths,
dependency conflicts, malformed Mach-O metadata, and failed transforms.
GitOrigin-RevId: 3be7a6fabf0135a57036cbb0a9a3e597096930fd
Benjamin Carlsson