georgem> libsystemd-id128.so: undefined reference to `sd_listen_fds'

In some toolchains (--as-needed not used or not working), the
toolchain doesn't drop this dependency. It is introduced because
sd-id128.so is linked against sd-shared.la, and some functions therein
use libsystemd-daemon, but libsd-id128 doesn't use any of those
functions.

This results in no change in libsystemd-id128.so when the unused
symbols are properly stripped.