virtiofsd: Pull in kernel's fuse.h

Update scripts/update-linux-headers.sh to add fuse.h and
use it to pull in fuse.h from the kernel; from v5.5-rc1

Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>

scripts/update-linux-headers.sh

@@ -186,6 +186,7 @@ rm -rf "$output/include/standard-headers/linux"
 mkdir -p "$output/include/standard-headers/linux"
 for i in "$tmpdir"/include/linux/*virtio*.h \
          "$tmpdir/include/linux/qemu_fw_cfg.h" \
+         "$tmpdir/include/linux/fuse.h" \
          "$tmpdir/include/linux/input.h" \
          "$tmpdir/include/linux/input-event-codes.h" \
          "$tmpdir/include/linux/pci_regs.h" \