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/simplejit/src/backend.rs

@@ -507,7 +507,7 @@ impl<'simple_jit_backend> Backend for SimpleJITBackend {
     ///
     /// This method does not need to be called when access to the memory
     /// handle is not required.
-    fn finish(self) -> Self::Product {
+    fn finish(self, _namespace: &ModuleNamespace<Self>) -> Self::Product {
         self.memory
     }
 }