Adjust perfschema.privilege_table_io result

This is fixup for the merge commit e6bdf77e

FIXME: Find out why the results differ between release and debug builds.

mysql-test/suite/perfschema/r/privilege_table_io,release.rdiff

+--- privilege_table_io.result
++++ privilege_table_io.result
+@@ -110,17 +110,6 @@
+ wait/io/table/sql/handler	handler.cc:	TABLE	mysql	roles_mapping	fetch	NULL
+ wait/io/table/sql/handler	handler.cc:	TABLE	mysql	tables_priv	fetch	NULL
+ wait/io/table/sql/handler	handler.cc:	TABLE	mysql	procs_priv	fetch	NULL
+-wait/io/table/sql/handler	handler.cc:	TABLE	mysql	table_stats	fetch	NULL
+-wait/io/table/sql/handler	handler.cc:	TABLE	mysql	column_stats	fetch	NULL
+-wait/io/table/sql/handler	handler.cc:	TABLE	mysql	column_stats	fetch	NULL
+-wait/io/table/sql/handler	handler.cc:	TABLE	mysql	column_stats	fetch	NULL
+-wait/io/table/sql/handler	handler.cc:	TABLE	mysql	column_stats	fetch	NULL
+-wait/io/table/sql/handler	handler.cc:	TABLE	mysql	column_stats	fetch	NULL
+-wait/io/table/sql/handler	handler.cc:	TABLE	mysql	column_stats	fetch	NULL
+-wait/io/table/sql/handler	handler.cc:	TABLE	mysql	column_stats	fetch	NULL
+-wait/io/table/sql/handler	handler.cc:	TABLE	mysql	column_stats	fetch	NULL
+-wait/io/table/sql/handler	handler.cc:	TABLE	mysql	column_stats	fetch	NULL
+-wait/io/table/sql/handler	handler.cc:	TABLE	mysql	index_stats	fetch	NULL
+ wait/io/table/sql/handler	handler.cc:	TABLE	mysql	servers	fetch	NULL
+ wait/io/table/sql/handler	handler.cc:	TABLE	mysql	table_stats	fetch	NULL
+ wait/io/table/sql/handler	handler.cc:	TABLE	mysql	column_stats	fetch	NULL

mysql-test/suite/perfschema/t/privilege_table_io.test

@@ -5,6 +5,7 @@
 --source include/not_embedded.inc
 --source include/have_perfschema.inc
 --source include/restart_mysqld.inc
+--source include/maybe_debug.inc
 --source ../include/table_io_setup_helper.inc
 
 # Remove "deleted" records from mysql.db that may come from previous tests,