fix for rpl_slave_load_remove_tmpfile.test

mysql-test/suite/rpl/r/rpl_slave_load_remove_tmpfile.result

 include/master-slave.inc
 [connection master]
 connection slave;
-set @saved_dbug = @@global.debug_dbug;
+SET @saved_dbug = @@GLOBAL.debug_dbug;
 SET @@global.debug_dbug= '+d,remove_slave_load_file_before_write';
 connection master;
 create table t1(a int not null auto_increment, b int, primary key(a)) engine=innodb;
@@ -22,5 +22,5 @@ call mtr.add_suppression("Slave: Can't get stat of .*");
 call mtr.add_suppression("Slave SQL: Error .Can.t get stat of.* error.* 13");
 call mtr.add_suppression("Slave: File.* not found.*");
 call mtr.add_suppression("Slave SQL: Error .File.* not found.* error.* 29");
-set @@global.debug_dbug = @saved_dbug;
+SET @@GLOBAL.debug_dbug = @saved_dbug;
 include/rpl_end.inc