BUG#14157: utf8 encoding in binlog without set character_set_client

fixing a path to find charset by $MYSQL client. I believe the fix is done what should be
by default. 

mysql-test/t/mysqlbinlog.test

@@ -118,7 +118,7 @@ select HEX(f) from t4;
 #14157: utf8 encoding in binlog without set character_set_client
 #
 flush logs;
---exec $MYSQL --default-character-set=koi8r test -e 'create table if not exists t5 (a int); set names koi8r; create temporary table `    ` (a int); insert into `    ` values (1); insert into t5 select * from `    `'
+--exec $MYSQL --character-sets-dir=../sql/share/charsets/ --default-character-set=koi8r test -e 'create table if not exists t5 (a int); set names koi8r; create temporary table `    ` (a int); insert into `    ` values (1); insert into t5 select * from `    `'
 
 # resulted log is client charset insensitive (latin1 not koi8r) as it must be
 --exec $MYSQL_BINLOG --short-form $MYSQL_TEST_DIR/var/log/master-bin.000006 | $MYSQL --default-character-set=latin1

mysql-test/t/rpl_temporary.test

@@ -164,7 +164,7 @@ drop table t1;
 #
 #14157: utf8 encoding in binlog without set character_set_client
 #
---exec $MYSQL --default-character-set=koi8r test -e 'create table t1 (a int); set names koi8r; create temporary table `ÔÏÌØËÏ ÇÅÒÏÉ ÓÒÅÚÁÀÔ ÒÁÛÐÉÌÅÍ ÇÒÉÍ` (a int); insert into `ÔÏÌØËÏ ÇÅÒÏÉ ÓÒÅÚÁÀÔ ÒÁÛÐÉÌÅÍ ÇÒÉÍ` values (1); insert into t1 select * from `ÔÏÌØËÏ ÇÅÒÏÉ ÓÒÅÚÁÀÔ ÒÁÛÐÉÌÅÍ ÇÒÉÍ`'
+--exec $MYSQL --character-sets-dir=../sql/share/charsets/ --default-character-set=koi8r test -e 'create table t1 (a int); set names koi8r; create temporary table `ÔÏÌØËÏ ÇÅÒÏÉ ÓÒÅÚÁÀÔ ÒÁÛÐÉÌÅÍ ÇÒÉÍ` (a int); insert into `ÔÏÌØËÏ ÇÅÒÏÉ ÓÒÅÚÁÀÔ ÒÁÛÐÉÌÅÍ ÇÒÉÍ` values (1); insert into t1 select * from `ÔÏÌØËÏ ÇÅÒÏÉ ÓÒÅÚÁÀÔ ÒÁÛÐÉÌÅÍ ÇÒÉÍ`'
 
 sync_slave_with_master;
 #connection slave;