Remove a deprecation warning

mysql-test/suite/innodb_gis/r/rtree_concurrent_srch.result

@@ -260,9 +260,7 @@ INSERT INTO t1  VALUES (1, ST_GeomFromText('LineString(6 6, 190 190)'));
 INSERT INTO t1  VALUES (1, ST_GeomFromText('LineString(7 7, 200 200)'));
 INSERT INTO t1  VALUES (1, ST_GeomFromText('LineString(8 8, 210 210)'));
 connect  a,localhost,root,,;
-SET SESSION debug="+d,rtr_pcur_move_to_next_return";
-Warnings:
-Warning	1287	'@@debug' is deprecated and will be removed in a future release. Please use '@@debug_dbug' instead
+SET SESSION debug_dbug='+d,rtr_pcur_move_to_next_return';
 set transaction isolation level serializable;
 start transaction;
 set @g1 = ST_GeomFromText('Polygon((100 100, 100 110, 110 110, 110 100, 100 100))');

mysql-test/suite/innodb_gis/t/rtree_concurrent_srch.test

@@ -307,7 +307,7 @@ INSERT INTO t1  VALUES (1, ST_GeomFromText('LineString(7 7, 200 200)'));
 INSERT INTO t1  VALUES (1, ST_GeomFromText('LineString(8 8, 210 210)'));
 
 connect (a,localhost,root,,);
-SET SESSION debug="+d,rtr_pcur_move_to_next_return";
+SET SESSION debug_dbug='+d,rtr_pcur_move_to_next_return';
 
 set transaction isolation level serializable;
 start transaction;