Add build scripts for embedded (netboot) edition

embedded/imager/board/overlay/init

@@ -0,0 +1,31 @@
+#!/bin/sh
+
+# Shorter startup sequence
+
+# Standard busybox init
+/bin/mount -t proc proc /proc
+/bin/mount -o remount,rw,noatime / 
+/bin/mount -t sysfs sysfs /sys
+/bin/mount -t devtmpfs dev /dev
+/bin/hostname -F /etc/hostname
+
+# udev
+/sbin/udevd -d
+udevadm trigger
+udevadm settle --timeout=2
+
+# Seed urandom with something
+cat /proc/cpuinfo /sys/class/drm/*/edid > /dev/urandom
+
+# dhcpcd
+dhcpcd -f /etc/dhcpcd.conf --noarp 2>/dev/null &
+
+if grep -q debugconsole /proc/cmdline; then
+	/sbin/getty -L console 0 vt100 &
+fi
+
+if grep -q blockingconsole /proc/cmdline; then
+    /sbin/getty -L console 0 vt100
+fi
+
+/etc/init.d/S99rpi-imager start