Add definitions 5.5.9 - #178

Signed-off-by: Rogerio Prado de Jesus <rogeriopradoj@gmail.com>
Chmod +x definition 5.5.9 - #178

Signed-off-by: Rogerio Prado de Jesus <rogeriopradoj@gmail.com>
Update STABLE_DEFINITIONS with 5.5.9 - #178

Signed-off-by: Rogerio Prado de Jesus <rogeriopradoj@gmail.com>
Update travis.yml to run 5.5.9 - #178

Fix #178: Add PHP 5.5.9

Signed-off-by: Rogerio Prado de Jesus <rogeriopradoj@gmail.com>
Merge pull request #179 from rogeriopradoj/fix-178

Fix #178: Add PHP 5.5.9