dev-java/jffi-1.2.6 was released on 2012-10-07. dev-java/jnr-ffi-0.7.10 was released on 2012-11-09. dev-java/jnr-posix-2.4.0 was released on 2012-12-02.
Bumped. jnr-ffi only up to version 0.7.9 as that one is the last version without backward incompatible changes.