Fixes one more failure in gcov run:

  - sys_vars.rpl_init_slave_func
    Added suppression for the unsafe warning.

mysql-test/suite/sys_vars/t/rpl_init_slave_func.test

@@ -31,6 +31,9 @@
 source include/master-slave.inc;
 --echo connection slave
 connection slave;
+--disable_query_log
+call mtr.add_suppression("Unsafe statement binlogged in statement format since BINLOG_FORMAT = STATEMENT");
+--enable_query_log
 #
 # save the current values