Remove semicolons from queries so it works with SQLite adapter.

[basilfx]

Using PDO SQLite adapter and and the option migrationsInDb = true when applying migrations, I get query errors because the queries that create/select/insert phalcon_migrations end with a semicolon.

This PR removes the semicolons, which should not affect further operations.

Details:

• Phalcon 2.1.x
• Phalcon Devtools 2.1.x
• Ubuntu 15.10
• PHP 5.6.11
• MySQL 5.6.28

Logs:

This is what is printed to console.

With PDO SQLite, without fix:

PHP Fatal error:  Uncaught exception 'PDOException' with message 'SQLSTATE[HY000]: General error: 1 near ";": syntax error' in /opt/backend/vendor/phalcon/devtools/scripts/Phalcon/Migrations.php:436

With PDO MySQL, without fix:

1459337109.4718: SELECT IF(COUNT(*) > 0, 1, 0) FROM `INFORMATION_SCHEMA`.`TABLES` WHERE `TABLE_NAME`= 'projects' AND `TABLE_SCHEMA` = 'dfdb'  => 1459337109.4724 (0.00060606002807617)

With PDO SQLite, with fix:

1459337106.1921: SELECT CASE WHEN COUNT(*) > 0 THEN 1 ELSE 0 END FROM sqlite_master WHERE type='table' AND tbl_name='projects'  => 1459337106.1924 (0.00031399726867676)

[basilfx]

Closed in favor of #639.