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>
Force root/root as names for uid0/gid0 instead of using the system
names. This helps make packed download tarballs more reproducible
Signed-off-by: Felix Fietkau <nbd@nbd.name>