Include products of gram.y to allow systems without bison to build Postgres.

 The parser recently grew too big for some yaccs, including FreeBSD.

src/backend/parser/parse.h

+typedef union
+{
+	double				dval;
+	int					ival;
+	char				chr;
+	char				*str;
+	bool				boolean;
+	bool*				pboolean;	/* for pg_user privileges */
+	List				*list;
+	Node				*node;
+	Value				*value;
+
+	Attr				*attr;
+
+	TypeName			*typnam;
+	DefElem				*defelt;
+	ParamString			*param;
+	SortGroupBy			*sortgroupby;
+	IndexElem			*ielem;
+	RangeVar			*range;
+	RelExpr				*relexp;
+	A_Indices			*aind;
+	ResTarget			*target;
+	ParamNo				*paramno;
+
+	VersionStmt			*vstmt;
+	DefineStmt			*dstmt;
+	RuleStmt			*rstmt;
+	InsertStmt			*astmt;
+} YYSTYPE;
+#define	ACTION	258
+#define	ADD	259
+#define	ALL	260
+#define	ALTER	261
+#define	AND	262
+#define	ANY	263
+#define	AS	264
+#define	ASC	265
+#define	BEGIN_TRANS	266
+#define	BETWEEN	267
+#define	BOTH	268
+#define	BY	269
+#define	CASCADE	270
+#define	CAST	271
+#define	CHAR	272
+#define	CHARACTER	273
+#define	CHECK	274
+#define	CLOSE	275
+#define	COLLATE	276
+#define	COLUMN	277
+#define	COMMIT	278
+#define	CONSTRAINT	279
+#define	CREATE	280
+#define	CROSS	281
+#define	CURRENT	282
+#define	CURRENT_DATE	283
+#define	CURRENT_TIME	284
+#define	CURRENT_TIMESTAMP	285
+#define	CURRENT_USER	286
+#define	CURSOR	287
+#define	DAY_P	288
+#define	DECIMAL	289
+#define	DECLARE	290
+#define	DEFAULT	291
+#define	DELETE	292
+#define	DESC	293
+#define	DISTINCT	294
+#define	DOUBLE	295
+#define	DROP	296
+#define	END_TRANS	297
+#define	EXECUTE	298
+#define	EXISTS	299
+#define	EXTRACT	300
+#define	FETCH	301
+#define	FLOAT	302
+#define	FOR	303
+#define	FOREIGN	304
+#define	FROM	305
+#define	FULL	306
+#define	GRANT	307
+#define	GROUP	308
+#define	HAVING	309
+#define	HOUR_P	310
+#define	IN	311
+#define	INNER_P	312
+#define	INSERT	313
+#define	INTERVAL	314
+#define	INTO	315
+#define	IS	316
+#define	JOIN	317
+#define	KEY	318
+#define	LANGUAGE	319
+#define	LEADING	320
+#define	LEFT	321
+#define	LIKE	322
+#define	LOCAL	323
+#define	MATCH	324
+#define	MINUTE_P	325
+#define	MONTH_P	326
+#define	NATIONAL	327
+#define	NATURAL	328
+#define	NCHAR	329
+#define	NO	330
+#define	NOT	331
+#define	NOTIFY	332
+#define	NULL_P	333
+#define	NUMERIC	334
+#define	ON	335
+#define	OPTION	336
+#define	OR	337
+#define	ORDER	338
+#define	OUTER_P	339
+#define	PARTIAL	340
+#define	POSITION	341
+#define	PRECISION	342
+#define	PRIMARY	343
+#define	PRIVILEGES	344
+#define	PROCEDURE	345
+#define	PUBLIC	346
+#define	REFERENCES	347
+#define	REVOKE	348
+#define	RIGHT	349
+#define	ROLLBACK	350
+#define	SECOND_P	351
+#define	SELECT	352
+#define	SET	353
+#define	SUBSTRING	354
+#define	TABLE	355
+#define	TIME	356
+#define	TIMESTAMP	357
+#define	TO	358
+#define	TRAILING	359
+#define	TRANSACTION	360
+#define	TRIM	361
+#define	UNION	362
+#define	UNIQUE	363
+#define	UPDATE	364
+#define	USING	365
+#define	VALUES	366
+#define	VARCHAR	367
+#define	VARYING	368
+#define	VIEW	369
+#define	WHERE	370
+#define	WITH	371
+#define	WORK	372
+#define	YEAR_P	373
+#define	ZONE	374
+#define	FALSE_P	375
+#define	TRIGGER	376
+#define	TRUE_P	377
+#define	TYPE_P	378
+#define	ABORT_TRANS	379
+#define	AFTER	380
+#define	AGGREGATE	381
+#define	ANALYZE	382
+#define	BACKWARD	383
+#define	BEFORE	384
+#define	BINARY	385
+#define	CLUSTER	386
+#define	COPY	387
+#define	DATABASE	388
+#define	DELIMITERS	389
+#define	DO	390
+#define	EACH	391
+#define	EXPLAIN	392
+#define	EXTEND	393
+#define	FORWARD	394
+#define	FUNCTION	395
+#define	HANDLER	396
+#define	INDEX	397
+#define	INHERITS	398
+#define	INSTEAD	399
+#define	ISNULL	400
+#define	LANCOMPILER	401
+#define	LISTEN	402
+#define	LOAD	403
+#define	LOCK_P	404
+#define	LOCATION	405
+#define	MOVE	406
+#define	NEW	407
+#define	NONE	408
+#define	NOTHING	409
+#define	NOTNULL	410
+#define	OIDS	411
+#define	OPERATOR	412
+#define	PROCEDURAL	413
+#define	RECIPE	414
+#define	RENAME	415
+#define	RESET	416
+#define	RETURNS	417
+#define	ROW	418
+#define	RULE	419
+#define	SEQUENCE	420
+#define	SETOF	421
+#define	SHOW	422
+#define	STATEMENT	423
+#define	STDIN	424
+#define	STDOUT	425
+#define	TRUSTED	426
+#define	VACUUM	427
+#define	VERBOSE	428
+#define	VERSION	429
+#define	ARCHIVE	430
+#define	USER	431
+#define	PASSWORD	432
+#define	CREATEDB	433
+#define	NOCREATEDB	434
+#define	CREATEUSER	435
+#define	NOCREATEUSER	436
+#define	VALID	437
+#define	UNTIL	438
+#define	IDENT	439
+#define	SCONST	440
+#define	Op	441
+#define	ICONST	442
+#define	PARAM	443
+#define	FCONST	444
+#define	OP	445
+#define	UMINUS	446
+#define	TYPECAST	447
+#define	REDUCE	448
+
+
+extern YYSTYPE yylval;