Update alternative expected output file.
Previous commit added a test to 'largeobject', but neglected the
alternative expected output file 'largeobject_1.source'. Per failure
on buildfarm animal 'hamerkop'.
Discussion: https://www.postgresql.org/message-id/
DBA08346-9962-4706-92D1-
230EE5201C10@yesql.se