Changes to unix

Changes to unix:
commit 7ca70fbf7b82bcca945669d043673a06973c1edf
Author: Herbert Valerio Riedel <hvr@gnu.org>
Date:   Thu Nov 7 13:22:34 2013 +0100

    Fix #7912 by using `CApiFFI` for `<termios.h>` imports

    On Android, the functions imported from `<termios.h>` are actually
    inlined functions, so we need to wrap them via the `capi` calling
    convention.

    Signed-off-by: Herbert Valerio Riedel <hvr@gnu.org>