Enable Systemd NSS module to support DynamicUsers

DynamicUsers flag in systemd service configuration file required to create,
handle and recycle temporary users.

This is essential module for upcoming daemons' privilege separation work.

Reference: https://github.com/openbmc/openbmc/issues/3383

Signed-off-by: Anton D. Kachalov <gmouse@google.com>
Change-Id: Iabd709c4a20f754fc6ea505e640b2d361aba0be2
diff --git a/meta-phosphor/conf/distro/include/phosphor-base.inc b/meta-phosphor/conf/distro/include/phosphor-base.inc
index af2e6ef..5b11481 100644
--- a/meta-phosphor/conf/distro/include/phosphor-base.inc
+++ b/meta-phosphor/conf/distro/include/phosphor-base.inc
@@ -120,7 +120,7 @@
 IMAGE_CLASSES_append = " image_types_phosphor phosphor-rootfs-postcommands"
 IMAGE_CLASSES_append_npcm7xx = " image_types_phosphor_nuvoton"
 
-IMAGE_INSTALL_append = " dbus-broker"
+IMAGE_INSTALL_append = " dbus-broker libnss-systemd"
 
 # Skip the udev database by default.  It adds around 2MB
 # compressed to the root filesystem, and probably doesn't