shill: Add shill's init scripts to shill package

All shill specific init scripts will be installed by shill in
platform2's ebuild instead of being installed by chromeos-init

BUG=chromium:346443
TEST=trybot on amd64-generic-paladin, x86-alex-paladin, daisy_spring-paladin, duck-release
CQ-DEPEND=CL:187487, CL:187523

Change-Id: I2767749464aeb2222b064bbe64c7f269ed3d9906
Reviewed-on: https://chromium-review.googlesource.com/187496
Reviewed-by: Mike Frysinger <vapier@chromium.org>
Reviewed-by: Richard Barnette <jrbarnette@chromium.org>
Tested-by: Bertrand Simonnet <bsimonnet@chromium.org>
Commit-Queue: Bertrand Simonnet <bsimonnet@chromium.org>
diff --git a/init/netfilter-common b/init/netfilter-common
new file mode 100644
index 0000000..8908941
--- /dev/null
+++ b/init/netfilter-common
@@ -0,0 +1,6 @@
+# Copyright (c) 2013 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.
+
+NETFILTER_INPUT_NFQUEUE=10000
+NETFILTER_OUTPUT_NFQUEUE=10001