updated making directory for database dumps

seafile-backup.py

@@ -82,6 +82,8 @@ if docker_command:
 
 # Dump the databases
 if db_dump:
+    if not os.path.exists(db_dump_tmp_path):
+        os.system(f"mkdir -p {db_dump_tmp_path}")
     for database in databases.split(','):
         os.system(f'mariadb-dump -h {db_dump_host} -u {db_dump_user} -p{db_dump_password} --skip-opt\
                    {database} > {db_dump_tmp_path}{database}.{now.strftime("%m-%d-%Y_%H-%M-%S")}.sql')