Serialize reftype for RTE_RELATION

Fixes "rules" regress test for running with orioledb

Author: homper

src/backend/nodes/outfuncs.c

@@ -504,6 +504,7 @@ _outRangeTblEntry(StringInfo str, const RangeTblEntry *node)
 		case RTE_RELATION:
 			WRITE_OID_FIELD(relid);
 			WRITE_CHAR_FIELD(relkind);
+			WRITE_INT_FIELD(reftype);
 			WRITE_INT_FIELD(rellockmode);
 			WRITE_NODE_FIELD(tablesample);
 			WRITE_UINT_FIELD(perminfoindex);

src/backend/nodes/readfuncs.c

@@ -494,6 +494,7 @@ _readRangeTblEntry(void)
 		case RTE_RELATION:
 			READ_OID_FIELD(relid);
 			READ_CHAR_FIELD(relkind);
+			READ_INT_FIELD(reftype);
 			READ_INT_FIELD(rellockmode);
 			READ_NODE_FIELD(tablesample);
 			READ_UINT_FIELD(perminfoindex);