cranelift-object: move relocation processing to finish

This removes the need to call `finalize_definitions` for cranelift-object.
`finalize_definitions` is only intended for backends that produce
finalized functions and data objects, which cranelift-object does not.

cranelift/faerie/src/backend.rs

@@ -311,7 +311,7 @@ impl Backend for FaerieBackend {
         // Nothing to do.
     }
 
-    fn finish(self) -> FaerieProduct {
+    fn finish(self, _namespace: &ModuleNamespace<Self>) -> FaerieProduct {
         FaerieProduct {
             artifact: self.artifact,
             trap_manifest: self.trap_manifest,