Fix broken {xufailed} production that made HEAD fail on 	select u&42 from table-with-a-u-column; Also fix missing SET_YYLLOC() in the {dolqfailed} production that I suppose this was based on.  The latter is a pre-existing bug, but the only effect is to misplace the error cursor by one token, so probably not worth backpatching.
Fix broken {xufailed} production that made HEAD fail on
	select u&42 from table-with-a-u-column;
Also fix missing SET_YYLLOC() in the {dolqfailed} production that I suppose
this was based on.  The latter is a pre-existing bug, but the only effect
is to misplace the error cursor by one token, so probably not worth
backpatching.

edespino/gpdb,ashwinstar/gpdb,ashwinstar/gpdb,edespino/gpdb,ashwinstar/gpdb,50wu/gpdb,lisakowen/gpdb,Chibin/gpdb,Postgres-XL/Postgres-XL,Postgres-XL/Postgres-XL,tpostgres-projects/tPostgres,yazun/postgres-xl,yazun/postgres-xl,ovr/postgres-xl,ovr/postgres-xl,snaga/postgres-xl,postmind-net/postgres-xl,ovr/postgres-xl,yuanzhao/gpdb,adam8157/gpdb,jmcatamney/gpdb,pavanvd/postgres-xl,ashwinstar/gpdb,jmcatamney/gpdb,lisakowen/gpdb,tpostgres-projects/tPostgres,Chibin/gpdb,edespino/gpdb,greenplum-db/gpdb,arcivanov/postgres-xl,ovr/postgres-xl,jmcatamney/gpdb,arcivanov/postgres-xl,arcivanov/postgres-xl,techdragon/Postgres-XL,yazun/postgres-xl,oberstet/postgres-xl,edespino/gpdb,zeroae/postgres-xl,zeroae/postgres-xl,snaga/postgres-xl,yuanzhao/gpdb,kmjungersen/PostgresXL,lisakowen/gpdb,kmjungersen/PostgresXL,Chibin/gpdb,greenplum-db/gpdb,tpostgres-projects/tPostgres,pavanvd/postgres-xl,oberstet/postgres-xl,edespino/gpdb,zeroae/postgres-xl,adam8157/gpdb,jmcatamney/gpdb,lisakowen/gpdb,greenplum-db/gpdb,arcivanov/postgres-xl,yuanzhao/gpdb,pavanvd/postgres-xl,Chibin/gpdb,xinzweb/gpdb,snaga/postgres-xl,Postgres-XL/Postgres-XL,oberstet/postgres-xl,edespino/gpdb,jmcatamney/gpdb,xinzweb/gpdb,pavanvd/postgres-xl,kmjungersen/PostgresXL,greenplum-db/gpdb,lisakowen/gpdb,ashwinstar/gpdb,Chibin/gpdb,greenplum-db/gpdb,oberstet/postgres-xl,adam8157/gpdb,50wu/gpdb,zeroae/postgres-xl,techdragon/Postgres-XL,adam8157/gpdb,ashwinstar/gpdb,yuanzhao/gpdb,greenplum-db/gpdb,yuanzhao/gpdb,50wu/gpdb,50wu/gpdb,oberstet/postgres-xl,yuanzhao/gpdb,greenplum-db/gpdb,postmind-net/postgres-xl,postmind-net/postgres-xl,lisakowen/gpdb,techdragon/Postgres-XL,Chibin/gpdb,jmcatamney/gpdb,edespino/gpdb,yuanzhao/gpdb,jmcatamney/gpdb,adam8157/gpdb,Chibin/gpdb,50wu/gpdb,lisakowen/gpdb,xinzweb/gpdb,adam8157/gpdb,edespino/gpdb,edespino/gpdb,ovr/postgres-xl,Chibin/gpdb,jmcatamney/gpdb,yazun/postgres-xl,Postgres-XL/Postgres-XL,yuanzhao/gpdb,postmind-net/postgres-xl,ashwinstar/gpdb,adam8157/gpdb,50wu/gpdb,pavanvd/postgres-xl,kmjungersen/PostgresXL,50wu/gpdb,techdragon/Postgres-XL,Postgres-XL/Postgres-XL,50wu/gpdb,yuanzhao/gpdb,lisakowen/gpdb,xinzweb/gpdb,snaga/postgres-xl,snaga/postgres-xl,yuanzhao/gpdb,postmind-net/postgres-xl,xinzweb/gpdb,xinzweb/gpdb,tpostgres-projects/tPostgres,yazun/postgres-xl,kmjungersen/PostgresXL,arcivanov/postgres-xl,xinzweb/gpdb,tpostgres-projects/tPostgres,Chibin/gpdb,edespino/gpdb,techdragon/Postgres-XL,xinzweb/gpdb,arcivanov/postgres-xl,greenplum-db/gpdb,adam8157/gpdb,Chibin/gpdb,ashwinstar/gpdb,zeroae/postgres-xl