CVE-2020-10737: defer setting permissions on newly-created home directories
mkhomedir: add a patch from Matthias Gerstner of the SUSE security team
to defer setting permissions on newly-created home directories until
after we've finished populating them, to prevent possible interference
and attacks from the user who will eventually be given access to the new
home directory, while it's still being populated (CVE-2020-10737).
Author: Matthias Gerstner
Signed-off-by: Nalin Dahyabhai <email@example.com>