Official repository ports.ubuntu.com misses package login (from shadow) for architecture armhf for Ubuntu 14.04.
Because of this debootstrap can’t create build chroot.
Need to wait till repo be fixed.
Package for Ubuntu 14.04 armhf will not be builded.
Update by 2020/01/15: This was problem caused by
grep --perl-regexp issue at build machine (Ubuntu 16.04) in debootstrap.
Returned old behavior via
grep -E, packages for armhf will build again.