double-locking of LOCK_thd_kill in performance_schema.session_status

--source include/have_innodb.inc

SELECT table_catalog,table_schema,table_name,index_schema,index_name FROM information_schema.statistics;

SET max_session_mem_used=32768;

--ERROR ER_OPTION_PREVENTS_STATEMENT

SELECT * FROM performance_schema.session_status;

SET GLOBAL innodb_io_capacity_max=100;

safe_mutex: Found wrong usage of mutex 'LOCK_global_system_variables' and 'LOCK_thd_kill'

Mutex currently locked (in reverse order):

LOCK_thd_kill                     /test/mtest/11.4_dbg/sql/sql_class.h  line 4703

LOCK_global_system_variables      /test/mtest/11.4_dbg/sql/sys_vars_shared.h  line 56