Reduce test case runtime.

mysql-test/r/lock_multi_bug38499.result:
  Update test case result.
mysql-test/r/lock_multi_bug38691.result:
  Update test case result.
mysql-test/t/lock_multi_bug38499.test:
  Do not sync .frm files.
mysql-test/t/lock_multi_bug38691.test:
  Do not sync .frm files.

mysql-test/r/lock_multi_bug38499.result

+SET @odl_sync_frm = @@global.sync_frm;
+SET @@global.sync_frm = OFF;
 DROP TABLE IF EXISTS t1;
 CREATE TABLE t1( a INT, b INT );
 INSERT INTO t1 VALUES (1, 1), (2, 2), (3, 3), (4, 4);
@@ -17,3 +19,4 @@ ALTER TABLE t1 ADD COLUMN a INT;
 # 2.2.1. normal mode
 # 2.2.2. PS mode
 DROP TABLE t1;
+SET @@global.sync_frm = @odl_sync_frm;

mysql-test/r/lock_multi_bug38691.result

+SET @odl_sync_frm = @@global.sync_frm;
+SET @@global.sync_frm = OFF;
 DROP TABLE IF EXISTS t1,t2,t3;
 CREATE TABLE t1 (
 a int(11) unsigned default NULL,
@@ -15,3 +17,4 @@ CREATE TABLE t3 SELECT * FROM t1;
 # normal mode
 # PS mode
 DROP TABLE t1, t2, t3;
+SET @@global.sync_frm = @odl_sync_frm;

mysql-test/t/lock_multi_bug38499.test

@@ -5,6 +5,9 @@
 # Save the initial number of concurrent sessions
 --source include/count_sessions.inc
 
+SET @odl_sync_frm = @@global.sync_frm;
+SET @@global.sync_frm = OFF;
+
 connect (locker,localhost,root,,);
 connect (writer,localhost,root,,);
 
@@ -214,6 +217,8 @@ DROP TABLE t1;
 --disconnect locker
 --disconnect writer
 
+SET @@global.sync_frm = @odl_sync_frm;
+
 # End of 5.0 tests
 
 # Wait till all disconnects are completed

mysql-test/t/lock_multi_bug38691.test

@@ -8,6 +8,9 @@
 # Save the initial number of concurrent sessions
 --source include/count_sessions.inc
 
+SET @odl_sync_frm = @@global.sync_frm;
+SET @@global.sync_frm = OFF;
+
 # Test to see if select will get the lock ahead of low priority update
 
 connect (locker,localhost,root,,);
@@ -136,6 +139,8 @@ DROP TABLE t1, t2, t3;
 --disconnect locker
 --disconnect writer
 
+SET @@global.sync_frm = @odl_sync_frm;
+
 # Wait till all disconnects are completed
 --source include/wait_until_count_sessions.inc