mariadb: move mysql_upgrade to the client package

It's really a client. It connects to the running server as a client, to
upgrade the DBs. And it depends on both mysql and mysqlcheck.

Signed-off-by: Sebastian Kemper <sebastian_ml@gmx.net>

utils/mariadb/Makefile

@@ -116,6 +116,7 @@ plugin-wsrep_info               := PLUGIN_WSREP_INFO
 
 MARIADB_CLIENT := \
 	mysql \
+	mysql_upgrade \
 	mysqlcheck
 
 MARIADB_CLIENT_EXTRA := \
@@ -133,7 +134,6 @@ MARIADB_SERVER := \
 	innochecksum \
 	my_print_defaults \
 	mysql_install_db \
-	mysql_upgrade \
 	mysqld
 
 MARIADB_SERVER_EXTRA := \