Add a default LFS .gitattributes for now

Otherwise some packages will break to import

lib/git_exporter.py

@@ -150,6 +150,9 @@ class GitExporter:
             )
             self.git.add(file)
 
+        # Overwrite ".gitattributes" with the
+        self.git.add_default_lfs_gitattributes(force=True)
+
         commit = self.git.commit(
             f"OBS User {flat.commit.userid}",
             "null@suse.de",