/var/cache/opkg wasn't being deleted, and /var/lib/opkg doesn't need
to exist as there are no lockfiles that write into it after this step.
(From OE-Core rev: 2209cef2cbe5fbdd5562f13f84ae2a3935f4fb61)
Signed-off-by: Ross Burton <ross.burton@arm.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>