Revert "remove /run migration script"

For some reason removing this broke the build.

This reverts commit 5246ea7b6f.

sh/.gitignore

@@ -4,4 +4,5 @@ openrc-run.sh
 cgroup-release-agent.sh
 init.sh
 init-early.sh
+migrate-to-run.sh
 binfmt.sh

sh/Makefile

@@ -14,7 +14,8 @@ SRCS-FreeBSD=
 BIN-FreeBSD=
 
 SRCS-Linux=	binfmt.sh.in cgroup-release-agent.sh.in init-early.sh.in \
-BIN-Linux=	binfmt.sh cgroup-release-agent.sh init-early.sh
+	migrate-to-run.sh.in
+BIN-Linux=	binfmt.sh cgroup-release-agent.sh init-early.sh migrate-to-run.sh
 INC-Linux= rc-cgroup.sh
 
 SRCS-NetBSD=

sh/migrate-to-run.sh.in

@@ -0,0 +1,36 @@
+#!/bin/sh
+# Copyright (c) 2012-2015 The OpenRC Authors.
+# See the Authors file at the top-level directory of this distribution and
+# https://github.com/OpenRC/openrc/blob/master/AUTHORS
+#
+# This file is part of OpenRC. It is subject to the license terms in
+# the LICENSE file found in the top-level directory of this
+# distribution and at https://github.com/OpenRC/openrc/blob/master/LICENSE
+# This file may not be copied, modified, propagated, or distributed
+#    except according to the terms contained in the LICENSE file.
+
+. "@LIBEXECDIR@/sh/functions.sh"
+
+if [ -e /run/openrc/softlevel ]; then
+	einfo "The OpenRC dependency data has already been migrated."
+	exit 0
+fi
+
+if [ ! -d /run ]; then
+	eerror "/run is not a directory."
+	eerror "moving /run to /run.pre-openrc"
+	mv /run /run.pre-openrc
+	mkdir /run
+fi
+
+rm -rf /run/openrc
+
+if ! mountinfo -q -f tmpfs /run; then
+	ln -s "@LIBEXECDIR@"/init.d /run/openrc
+else
+	cp -a "@LIBEXECDIR@/init.d" /run/openrc
+	rc-update -u
+fi
+
+einfo "The OpenRC dependency data was migrated successfully."
+exit 0