Drop the jfs USE flag because we lack libjfs. I can't find any trace of it
anywhere! I gather jfs might be dropped from the kernel soon anyway.
I've bumped fuse to version 3, but only for the non-static build because the
newer version lacks the static-libs USE flag. partclone supports both.
Signed-off-by: James Le Cuirot <chewi@gentoo.org>
