[init] trigger late_start on property change

Android's late_start is triggered by mount_all. Mer omits running mount_all
and does its own fs setup.

This will spawn a service which will trigger late_start in Android's init.

Signed-off-by: Simonas Leleiva <simonas.leleiva@jollamobile.com>

Makefile

@@ -21,6 +21,8 @@ install:
 	ln -s ../droid-hal-init.service $(DESTDIR)/lib/systemd/system/basic.target.wants/droid-hal-init.service
 	install -D -m 644 systemd/droid-battery-monitor.service $(DESTDIR)/lib/systemd/system/droid-battery-monitor.service
 	ln -s ../droid-battery-monitor.service/ $(DESTDIR)/lib/systemd/system/basic.target.wants/
+	install -D -m 644 systemd/droid-late-start.service $(DESTDIR)/lib/systemd/system/droid-late-start.service
+	ln -s ../droid-late-start.service $(DESTDIR)/lib/systemd/system/basic.target.wants/
 	install -D -m 644 systemd/adbd.service $(DESTDIR)/lib/systemd/system/adbd.service
 
 	# RPM macros

systemd/droid-late-start.service

@@ -0,0 +1,12 @@
+[Unit]
+Description=droid-late-start
+After=droid-hal-init.service
+Before=network.target start-user-session@USER.service bluetooth.service ofono.service sensord.service
+Conflicts=shutdown.target actdead.target
+
+[Service]
+ExecStart=/usr/bin/setprop droid.late_start trigger_late_start
+
+[Install]
+WantedBy=basic.target
+