Trigger udev rules after adding apex group

That fixes /dev/apex* group on first board boot

Change-Id: Ic32f69c8f177c4abedea1d533b293de4f640abdb
diff --git a/etc/runonce.d/00-rootfs-cleanups b/etc/runonce.d/00-rootfs-cleanups
index d7ca1ad..263e14a 100755
--- a/etc/runonce.d/00-rootfs-cleanups
+++ b/etc/runonce.d/00-rootfs-cleanups
@@ -22,6 +22,10 @@
     groupadd apex 2>&1 >>/var/log/rootfs-cleanups.log
 fi
 
+# Reload and trigger udev rules so that apex devices get proper attributes
+udevadm control --reload-rules
+udevadm trigger
+
 MENDEL_GROUPS="adm audio bluetooth games i2c input plugdev staff sudo users video netdev systemd-journal apex"
 
 for i in $MENDEL_GROUPS; do