Typo in create_index regression test

While looking at create_index.sql, I noticed the following:

--
-- Check handling of indexes on system columns
--
CREATE TABLE syscol_table (a INT);

-- System columns cannot be indexed
CREATE INDEX ON syscolcol_table (ctid);

which isn't testing what it claims to test because there's a typo in
the table name. Patch attached.

Regards,
Dean