termina_container_tools: add libnss for Xwayland

glibc will dlopen() libnss, and for some reason that is necessary for
Xwayland work.

BUG=chromium:841641
TEST=sommelier -X works on kevin

Change-Id: I73b27aab7f346bd24ce6c8ace08752a3ba57d447
Reviewed-on: https://chromium-review.googlesource.com/1068620
Commit-Ready: Stephen Barber <smbarber@chromium.org>
Tested-by: Stephen Barber <smbarber@chromium.org>
Reviewed-by: Stephen Barber <smbarber@chromium.org>
2 files changed