Bumps version to qi-framework 1.8.4.
Bumps version to qi-framework 1.8.4.

This libqi release aims to improve security and reliability.

Change-Id: I6613f92e977df70713e4fc098b20617b75b746e9
Reviewed-on: http://gerrit2.aldebaran.lan/1242
Reviewed-by: gerrit <3b97070d46ccd66422a8e7b83e6967ed84780538@aldebaran-robotics.com>
Tested-by: gerrit <3b97070d46ccd66422a8e7b83e6967ed84780538@aldebaran-robotics.com>
Reviewed-by: vincent.palancher <f8ff75e1c61314c499fafa8de0d9e004e87e66b0@softbankrobotics.com>
Reviewed-by: jmonnon <8898eaf233516e520f996a244ca8a12d20f948b1@aldebaran.com>

aldebaran/libqi,aldebaran/libqi,aldebaran/libqi