Add init scripts for the metrics package

We are moving the init scripts out of chromeos-init
and into metrics/init.

BUG=chromium:346444
TEST=cbuildbot on x86-alex-paladin
CQ-DEPEND=CL:187455, CL:187470

Change-Id: If226addfaa154794361d3cf9687ca336b95b3104
Reviewed-on: https://chromium-review.googlesource.com/187456
Reviewed-by: Gaurav Shah <gauravsh@chromium.org>
Reviewed-by: Mike Frysinger <vapier@chromium.org>
Commit-Queue: Bertrand Simonnet <bsimonnet@chromium.org>
Tested-by: Bertrand Simonnet <bsimonnet@chromium.org>
diff --git a/metrics/init/metrics_daemon.conf b/metrics/init/metrics_daemon.conf
new file mode 100644
index 0000000..68edff4
--- /dev/null
+++ b/metrics/init/metrics_daemon.conf
@@ -0,0 +1,15 @@
+# Copyright (c) 2014 The Chromium OS Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+description     "Metrics collection daemon"
+author          "chromium-os-dev@chromium.org"
+
+# The metrics daemon is responsible for receiving and forwarding to
+# chrome UMA statistics not produced by chrome.
+start on starting system-services
+stop on stopping system-services
+respawn
+
+expect fork
+exec metrics_daemon