fix(sdk/kotlin): alias JNA Library import to unblock compileKotlin
The SDK exposes a UniFFI Object named `Library` (the uploaded-music client),
whose generated Kotlin class shares its simple name with `com.sun.jna.Library`
imported by the UniFFI runtime. An unqualified `Library` then resolved to our
Object, breaking `UniffiLib`/`loadIndirect` and failing `:rocksky:compileKotlin`
during `sdk/publish :kotlin`.
Alias the JNA import as `JnaLibrary` (so unqualified `Library` stays our Object)
and qualify the two JNA usages. Bake the same post-patch into gen-bindings.sh so
future UniFFI regens stay fixed.