MDEV-13549: Galera test failures

Fix test failure on galera_flush_local.

mysql-test/suite/galera/disabled.def

@@ -10,7 +10,6 @@
 #
 ##############################################################################
 galera_gra_log : MDEV-13549 Galera test failures
-galera_flush_local : MDEV-13549 Galera test failures
 galera_flush :  MDEV-13549 Galera test failures
 galera_account_management : MariaDB 10.0 does not support ALTER USER
 galera_binlog_row_image : MariaDB 10.0 does not support binlog_row_image

mysql-test/suite/galera/include/have_wsrep_replicate_myisam.inc

+--require suite/galera/r/have_wsrep_replicate_myisam.require
+disable_query_log;
+SHOW VARIABLES LIKE 'wsrep_replicate_myisam';
+enable_query_log;

mysql-test/suite/galera/r/have_wsrep_replicate_myisam.require

+Variable_name	Value
+wsrep_replicate_myisam	ON

mysql-test/suite/galera/t/galera_flush_local.opt

---query_cache_type=1 --query_cache_size=1000000
+--query_cache_type=1
+--query_cache_size=1000000
+--wsrep_replicate_myisam=ON

mysql-test/suite/galera/t/galera_flush_local.test

@@ -5,6 +5,7 @@
 --source include/galera_cluster.inc
 --source include/have_innodb.inc
 --source include/have_query_cache.inc
+--source include/have_wsrep_replicate_myisam.inc
 
 --disable_warnings
 DROP TABLE IF EXISTS t1, t2, x1, x2;