ostree-ext: store: clear diff_ids when exporting to oci

Resolves: #1134

Author: jeckersb

ostree-ext/src/container/store.rs

@@ -1414,6 +1414,7 @@ pub(crate) fn export_to_oci(
     new_manifest.layers_mut().clear();
     let mut new_config = srcinfo.configuration.clone();
     new_config.history_mut().clear();
+    new_config.rootfs_mut().diff_ids_mut().clear();
 
     let mut dest_oci = ocidir::OciDir::ensure(dest_oci)?;