## Why
The Rust GStreamer bindings link GLib's GIO library even when none of the selected plugins imports it. Following only plugin dependencies can omit a library the bindings need.
## What changed
- Export `gio-2.0` pkg-config metadata in the voice SDK.
- Require GIO as a runtime dependency root on Linux, macOS, and Windows, including its transitive dependencies under the existing import checks.
- Reject runtime packages that omit the required GIO library.
## Testing
Extend fixtures to cover GIO inclusion and missing-library rejection across platforms, loading GIO and its transitive dependency after moving a Linux runtime, and resolving `gio-2.0` through pkg-config after moving an SDK.
GitOrigin-RevId: d12e45d387d56c54d94d788cf07d82bb22c2b4a3
## 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
