pciguard: Add user and group

Add new user and group for the external PCI authorization daemon.

BUG=b:171541662,b:167448768
TEST=display-accts.py --lint

Change-Id: I302443accc954028437c47abdb62928e6fbc3078
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/overlays/eclass-overlay/+/2543285
Reviewed-by: Jorge Lucangeli Obes <jorgelo@chromium.org>
Reviewed-by: Aashay Shringarpure <aashay@google.com>
Tested-by: Rajat Jain <rajatja@google.com>
Commit-Queue: Rajat Jain <rajatja@google.com>
diff --git a/profiles/base/accounts/group/pciguard b/profiles/base/accounts/group/pciguard
new file mode 100644
index 0000000..41ce6f7
--- /dev/null
+++ b/profiles/base/accounts/group/pciguard
@@ -0,0 +1,3 @@
+group:pciguard
+gid:20160
+users:pciguard
diff --git a/profiles/base/accounts/user/pciguard b/profiles/base/accounts/user/pciguard
new file mode 100644
index 0000000..7593379
--- /dev/null
+++ b/profiles/base/accounts/user/pciguard
@@ -0,0 +1,6 @@
+user:pciguard
+uid:20160
+gid:20160
+gecos:External PCI device authorization daemon
+home:/dev/null
+shell:/bin/false