Add smdisplay user and group

Smdisplay user will be used for SMIUSBDisplay daemon which handles SMI devices.

BUG=none
TEST=smdisplay user and smdisplay group are added to the built image

Change-Id: I966e87b2f564ad61f08567b78b42835fa9152e60
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/overlays/eclass-overlay/+/2242632
Reviewed-by: Mike Frysinger <vapier@chromium.org>
Tested-by: Teddy Wang <teddy.wang@siliconmotions.corp-partner.google.com>
Commit-Queue: Bernie Thompson <bhthompson@chromium.org>
diff --git a/profiles/base/accounts/group/smdisplay b/profiles/base/accounts/group/smdisplay
new file mode 100644
index 0000000..3eb8071
--- /dev/null
+++ b/profiles/base/accounts/group/smdisplay
@@ -0,0 +1,3 @@
+group:smdisplay
+gid:20148
+users:
diff --git a/profiles/base/accounts/user/smdisplay b/profiles/base/accounts/user/smdisplay
new file mode 100644
index 0000000..d5feb32
--- /dev/null
+++ b/profiles/base/accounts/user/smdisplay
@@ -0,0 +1,6 @@
+user:smdisplay
+uid:20148
+gid:20148
+gecos:SMIUSBDisplay daemon user
+home:/dev/null
+shell:/bin/false