Bug#39451 Debug builds broken with Sun Studio compiler

            
Debug builds of MySQL 5.1, 6.0 with Sun Studio 12 broke because of
use of gcc specific feature.
            
The fix is to replace __FUNCTION__ with the corresponding character string

sql/log.cc

@@ -3779,7 +3779,7 @@ THD::binlog_set_pending_rows_event(Rows_log_event* ev)
 int
 MYSQL_BIN_LOG::remove_pending_rows_event(THD *thd)
 {
-  DBUG_ENTER(__FUNCTION__);
+  DBUG_ENTER("MYSQL_BIN_LOG::remove_pending_rows_event");
 
   binlog_trx_data *const trx_data=
     (binlog_trx_data*) thd_get_ha_data(thd, binlog_hton);

sql/sql_class.cc

@@ -3513,7 +3513,7 @@ int THD::binlog_delete_row(TABLE* table, bool is_trans,
 
 int THD::binlog_remove_pending_rows_event(bool clear_maps)
 {
-  DBUG_ENTER(__FUNCTION__);
+  DBUG_ENTER("THD::binlog_remove_pending_rows_event");
 
   if (!mysql_bin_log.is_open())
     DBUG_RETURN(0);