Avoiding SESSION with debug, since it does not work in valgrind

mysql-test/r/rpl_incident.result

@@ -13,9 +13,9 @@ a
 2
 3
 SET @saved = @@debug;
-SET SESSION debug="d,incident_database_resync_on_replace";
+SET GLOBAL debug="d,incident_database_resync_on_replace";
 REPLACE INTO t1 VALUES (4);
-SET SESSION debug=@saved;
+SET GLOBAL debug=@saved;
 SELECT * FROM t1;
 a
 1

mysql-test/t/rpl_incident.test

@@ -8,12 +8,12 @@ INSERT INTO t1 VALUES (1),(2),(3);
 SELECT * FROM t1;
 
 SET @saved = @@debug;
-SET SESSION debug="d,incident_database_resync_on_replace";
+SET GLOBAL debug="d,incident_database_resync_on_replace";
 
 # This will generate an incident log event and store it in the binary
 # log before the replace statement.
 REPLACE INTO t1 VALUES (4);
-SET SESSION debug=@saved;
+SET GLOBAL debug=@saved;
 --save_master_pos
 SELECT * FROM t1;