Updates luacppbridge51 dependency

commit 8ba333b1519e499bf730bbe5fe72f6d000cc848d
Author: Ignacio Burgueño <ignaciob@inconcertcc.com>
Date:   Thu Jul 24 10:08:31 2014 -0300

    Adds get_full_class_name_T function to provide better introspection.

    This commit adds the function get_full_class_name_T which can be overriden
    by the exposed classes. The returned string is used to populate the __name
    field of the exposed class metatable. This allows to provide better introspection
    since we can provide the full name of the class (i.e. including the module name)
    instead of just using exported class name.

    By default, get_full_class_name_T will return the className unless overridden.