Fix broken 20_file_backend_index.diff patch.
Fix broken 20_file_backend_index.diff patch.


community-ssu/evolution-data-server,community-ssu/evolution-data-server,community-ssu/evolution-data-server,community-ssu/evolution-data-server,community-ssu/evolution-data-server,community-ssu/evolution-data-server,community-ssu/evolution-data-server,community-ssu/evolution-data-server,community-ssu/evolution-data-server,community-ssu/evolution-data-server,community-ssu/evolution-data-server