makedist: Use fixed owner/group in generated tarball (#10613)

This reduces the amount of system-dependent data within the tarball and makes
it more reproducible. Instead of the information of the release manager that
generates the tarball, the tarball will include the fixed 0:0 value as
owner:group.

Author: TimWolla

scripts/dev/makedist

@@ -175,7 +175,7 @@ cd ..
 
 echo ""
 echo "makedist: Creating $prefix.tar archive."
-"$tar" cf "$prefix".tar "$prefix"
+"$tar" cf "$prefix".tar --owner=0 --group=0 --numeric-owner "$prefix"
 rm -rf "$prefix" "$prefix".tar.*
 
 echo "makedist: Creating $prefix.tar.gz archive."