Added empty TOASTER files and corrected some minor glitches

src/backend/access/common/tupdesc.c

src/backend/access/heap/Makefile

src/backend/access/heap/heapam.c

src/backend/access/heap/tuptoaster.c

src/include/access/htup.h

src/include/access/tupmacs.h

src/include/access/tuptoaster.h

src/include/postgres.h

src/test/regress/expected/opr_sanity.out

src/test/regress/expected/rules.out

src/test/regress/sql/opr_sanity.sql