[#5408] [YSQL] Fix declarations of couple jsonpath functions

Summary:
Original commit was da24961e9e1d887111d17cc2dcece2e3946ca5a6

Commit message was

    Make jsonb_path_query_array() and jsonb_path_query_first() use
    PG_FUNCTION_ARGS macro instead of its expansion.

Test Plan: Build yugabyte db and run test

Reviewers: mihnea, jason

Reviewed By: jason

Subscribers: yql

Differential Revision: https://phabricator.dev.yugabyte.com/D9463

src/postgres/src/backend/utils/adt/jsonpath_exec.c

@@ -417,7 +417,7 @@ jsonb_path_query(PG_FUNCTION_ARGS)
  *		jsonb array.
  */
 Datum
-jsonb_path_query_array(FunctionCallInfo fcinfo)
+jsonb_path_query_array(PG_FUNCTION_ARGS)
 {
 	Jsonb	   *jb = PG_GETARG_JSONB_P(0);
 	JsonPath   *jp = PG_GETARG_JSONPATH_P(1);
@@ -436,7 +436,7 @@ jsonb_path_query_array(FunctionCallInfo fcinfo)
  *		item.  If there are no items, NULL returned.
  */
 Datum
-jsonb_path_query_first(FunctionCallInfo fcinfo)
+jsonb_path_query_first(PG_FUNCTION_ARGS)
 {
 	Jsonb	   *jb = PG_GETARG_JSONB_P(0);
 	JsonPath   *jp = PG_GETARG_JSONPATH_P(1);