pseudo: Add fcntl64 wrapper

Add fcntl64 wrapper which hopefully fixes issues seen in findutils and the find
command in the libtool removal code when built with LFS compile flags on Gentoo.

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
(cherry picked from commit f26867fe)
Signed-off-by: Steve Sakoman <steve@sakoman.com>