package/gitlab-runner: new package

We rely on config.toml to be created manually during first boot as
setup stage. Even with an empty config.toml file, the gitlab-runner
needs gitlab registration token to register to a gitlab server.

Use the 14.5.1 release since 14.5.2 and 14.6.0 triggers a build error [1]
due a patch for GO < 1.17.
(helpers/patches/issue_28732/syscall.go:11:2: undefined: syscall.Issue28732Fix)

Tested:
https://gitlab.com/kubu93/buildroot/-/pipelines/442604876

[1] https://gitlab.com/gitlab-org/gitlab-runner/-/issues/28766

Signed-off-by: Marcin Niestroj <m.niestroj@grinn-global.com>
Signed-off-by: Romain Naour <romain.naour@smile.fr>
Cc: Jérémy Rosen <jeremy.rosen@smile.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/gitlab-runner/S95gitlab-runner

@@ -0,0 +1,64 @@
+#!/bin/sh
+
+DAEMON="gitlab-runner"
+PIDFILE="/var/run/$DAEMON.pid"
+
+GITLAB_RUNNER_ARGS="run"
+
+# shellcheck source=/dev/null
+[ -r "/etc/default/$DAEMON" ] && . "/etc/default/$DAEMON"
+
+start() {
+	printf 'Starting %s: ' "$DAEMON"
+	# shellcheck disable=SC2086 # we need the word splitting
+	start-stop-daemon -S -q -m -b -p "$PIDFILE" -c "$DAEMON:$DAEMON" -x "/usr/bin/$DAEMON" \
+		-- $GITLAB_RUNNER_ARGS
+	status=$?
+	if [ "$status" -eq 0 ]; then
+		echo "OK"
+	else
+		echo "FAIL"
+	fi
+	return "$status"
+}
+
+stop() {
+	printf 'Stopping %s: ' "$DAEMON"
+	start-stop-daemon -K -q -p "$PIDFILE" -u "$DAEMON"
+	status=$?
+	if [ "$status" -eq 0 ]; then
+		echo "OK"
+	else
+		echo "FAIL"
+	fi
+	return "$status"
+}
+
+restart() {
+	stop
+	sleep 1
+	start
+}
+
+reload() {
+	printf 'Reloading %s: ' "$DAEMON"
+	start-stop-daemon -K -s HUP -q -p "$PIDFILE" -u "$DAEMON"
+	status=$?
+	if [ "$status" -eq 0 ]; then
+		echo "OK"
+	else
+		echo "FAIL"
+	fi
+	return "$status"
+}
+
+case "$1" in
+	start|stop|restart)
+		"$1";;
+	reload)
+		# Restart, since there is no true "reload" feature.
+		restart;;
+	*)
+		echo "Usage: $0 {start|stop|restart|reload}"
+		exit 1
+esac