Register "auto_increment" as a SQLite noise word.

As seen in #302 it's possible to define a SQLite column of type "integer
auto_increment". In my testing tho, it doesn't mean a thing. Worse than
that, apparently when an integer column is created that is also used as
the primary key of the table, the notation "integer auto_increment
primary key" disables the rowid behavior that is certainly expected.

Let's not yet mark the bug as fixed as I suppose we will have to do
something about this rowid mess. Thanks again SQLite.

src/sources/sqlite/sqlite-cast-rules.lisp

@@ -58,7 +58,8 @@
       (let* ((sqlite-type-name (string-downcase sqlite-type-name))
              (tokens (remove-if (lambda (token)
                                   (or (member token '("unsigned" "short"
-                                                      "varying" "native")
+                                                      "varying" "native"
+                                                      "auto_increment")
                                               :test #'string-equal)
                                       ;; remove typemod too, as in "integer (8)"
                                       (char= #\( (aref token 0))))