This fixes the dreaded "lzma error 1" also reported on similar devices
Ref: https://bugs.openwrt.org/index.php?do=details&task_id=3057
Fixes: FS#3057
Signed-off-by: Daniel Engberg <daniel.engberg.lists@pyret.net>
(cherry picked from commit e83f7e5d76ebf74aa0a1f686d2941950fa5f22e2)