Extend SQL grammar to recognise 'without rowid' tables correctly

Since version 3.8.2 SQLite supports tables without the internal rowid
column added to the table. For these tables the primary key serves as a
replacement for the rowid column.

These changes update the grammar parser to correctly handle 'without
rowid' tables and also generate 'without rowid' SQL statements.

src/grammar/sqlite3.g

@@ -62,6 +62,7 @@ tokens {
   REPLACE="REPLACE";
   RESTRICT="RESTRICT";
   ROLLBACK="ROLLBACK";
+  ROWID="ROWID";
   SET="SET";
   TEMPORARY="TEMPORARY";
   TEMP="TEMP";
@@ -69,6 +70,7 @@ tokens {
   UNIQUE="UNIQUE";
   UPDATE="UPDATE";
   WHEN="WHEN";
+  WITHOUT="WITHOUT";
 
 //ast
 
@@ -252,7 +254,7 @@ keywordastablename
 createtable
   :
   CREATE (TEMP|TEMPORARY)? TABLE (IF_T NOT EXISTS)? (tablename | keywordastablename)
-  ( LPAREN columndef (COMMA columndef)* (COMMA tableconstraint)* RPAREN
+  ( LPAREN columndef (COMMA columndef)* (COMMA tableconstraint)* RPAREN (WITHOUT ROWID)?
   | AS selectstmt
   )
   {#createtable = #([CREATETABLE, "CREATETABLE"], #createtable);}