ptp: Add user and group for Precision Time Protocol services

BUG=b:144279331
TEST=profiles/base/accounts/display-accts.py --lint

Change-Id: I050fa3bf3e66288c91e12d553b71122c71230f1a
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/overlays/eclass-overlay/+/2253141
Reviewed-by: Allen Webb <allenwebb@google.com>
Tested-by: Pablo Ceballos <pceballos@chromium.org>
Commit-Queue: Pablo Ceballos <pceballos@chromium.org>

profiles/base/accounts/group/ptp

diff --git a/profiles/base/accounts/group/ptp b/profiles/base/accounts/group/ptp
new file mode 100644
index 0000000..f6b4ff4
--- /dev/null
+++ b/profiles/base/accounts/group/ptp
@@ -0,0 +1,3 @@
+group:ptp
+gid:20159
+users:ptp

profiles/base/accounts/user/ptp

diff --git a/profiles/base/accounts/user/ptp b/profiles/base/accounts/user/ptp
new file mode 100644
index 0000000..2a5bd90
--- /dev/null
+++ b/profiles/base/accounts/user/ptp
@@ -0,0 +1,6 @@
+user:ptp
+uid:20159
+gid:20159
+gecos:Precision Time Protocol services (ptp4l and phc2sys)
+home:/dev/null
+shell:/bin/false