update GNU tar to 1.30 Signed-off-by: Hannu Nyman <hannu.nyman@iki.fi>
On Linux, symlink permissions cannot be altered and are always 0777. On Mac OS X they can be 0755. Force 0777 here to keep tarballs reproducible across systems Signed-off-by: Felix Fietkau <nbd@nbd.name>