dnsmasq: add dnsmasq group and user

These are required to upgrade dnsmasq to 2.72 for the latest security
fixes.

BUG=chrome-os-partner:38062
TEST=precq bots
CQ-DEPEND=CL:269206,CL:269996

Change-Id: I4538365aad287655fa8b4300cae778d90a4828b4
Reviewed-on: https://chromium-review.googlesource.com/269400
Reviewed-by: Chris Masone <cmasone@chromium.org>
Tested-by: Timothy Jennison <tjennison@chromium.org>
Commit-Queue: Timothy Jennison <tjennison@chromium.org>
diff --git a/profiles/base/accounts/group/dnsmasq b/profiles/base/accounts/group/dnsmasq
new file mode 100644
index 0000000..e96db1b
--- /dev/null
+++ b/profiles/base/accounts/group/dnsmasq
@@ -0,0 +1,3 @@
+group:dnsmasq
+gid:268
+users:dnsmasq
\ No newline at end of file
diff --git a/profiles/base/accounts/user/dnsmasq b/profiles/base/accounts/user/dnsmasq
new file mode 100644
index 0000000..c9db80a
--- /dev/null
+++ b/profiles/base/accounts/user/dnsmasq
@@ -0,0 +1,6 @@
+user:dnsmasq
+uid:268
+gid:268
+gecos:dnsmasq
+home:/dev/null
+shell:/bin/false