fuse: upgrade to 2.9.4

Changes:
 * Remove 001-fix_exec_environment_for_mount_and_umount.patch
   which has been included in the new version

 * Add sysvinit and systemd support

 * For systemd, there is not a fuse.service since systemd provides
   sys-fs-fuse-connections.mount to mount the fuse control
   filesystem, so instead, only fuse.conf is added to modules-load.d
   to load the required fuse kernel module.

 * Add RDEPENDS on util-linux-mount

 * Add a patch to fix the return value of "--help" option

Signed-off-by: Jackie Huang <jackie.huang@windriver.com>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>