Add sensor group

BUG=b:27849483
TEST=Check the group exists

Change-Id: I0389951e5603f9d0670da39bf2205cd2a3fc73dc
Signed-off-by: Gwendal Grignou <gwendal@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/364585
Tested-by: Gwendal Grignou <gwendal@google.com>
Reviewed-by: Dylan Reid <dgreid@chromium.org>
diff --git a/profiles/base/accounts/group/arc-sensor b/profiles/base/accounts/group/arc-sensor
new file mode 100644
index 0000000..13b8816
--- /dev/null
+++ b/profiles/base/accounts/group/arc-sensor
@@ -0,0 +1,3 @@
+group:arc-sensor
+gid:604
+password:!