use correct collation_connection in --view

mysqltest should use the same collation_connection in the service
connection (that creates views) as in the main connection

this makes weight_string("aaa") to return the expected value in --view
and fixes main.func_str failure in --view

client/mysqltest.cc

@@ -8943,6 +8943,8 @@ int util_query(MYSQL* org_mysql, const char* query){
           org_mysql->unix_socket);
 
       cur_con->util_mysql= mysql;
+      if (mysql->charset != org_mysql->charset)
+        mysql_set_character_set(mysql, org_mysql->charset->csname);
     }
   }
   else