Fixes#3901:

When creating a virtual table like so:

CREATE VIRTUAL TABLE my_fts USING fts5 (    name,    description,    content='',    contentless_delete=1,    tokenize='porter');

SQLite automatically adds an extrarowid (int64) column to allfts5 virtual tables. However, this is not reflected in the schema. When I add a query like this:

-- name: InsertMyFTS :execINSERT INTO    my_fts (rowid, name, description)VALUES    (?, ?, ?);

and callsqlc generate, I get this error:

query.sql:12:1: column "rowid" does not exist