Make WAL description output more consistent

The output for record types XLOG_DBASE_CREATE and XLOG_DBASE_DROP used
the order dbid/tablespaceid, whereas elsewhere the order is
tablespaceid/dbid[/relfilenodeid].  Flip the order for those two types
to make it consistent.

Author: Jean-Christophe Arnu <jcarnu@gmail.com>
Discussion: https://www.postgresql.org/message-id/flat/CAHZmTm18Ln62KW-G8NYvO1wbBL3QU1E76Zep=DuHmg-zS2XFAg@mail.gmail.com/

src/backend/access/rmgrdesc/dbasedesc.c

@@ -29,15 +29,15 @@ dbase_desc(StringInfo buf, XLogReaderState *record)
 		xl_dbase_create_rec *xlrec = (xl_dbase_create_rec *) rec;
 
 		appendStringInfo(buf, "copy dir %u/%u to %u/%u",
-						 xlrec->src_db_id, xlrec->src_tablespace_id,
-						 xlrec->db_id, xlrec->tablespace_id);
+						 xlrec->src_tablespace_id, xlrec->src_db_id,
+						 xlrec->tablespace_id, xlrec->db_id);
 	}
 	else if (info == XLOG_DBASE_DROP)
 	{
 		xl_dbase_drop_rec *xlrec = (xl_dbase_drop_rec *) rec;
 
 		appendStringInfo(buf, "dir %u/%u",
-						 xlrec->db_id, xlrec->tablespace_id);
+						 xlrec->tablespace_id, xlrec->db_id);
 	}
 }