Add droid4 rootfs-overlay

extra/droid4/etc/X11/xorg.conf.d/40-input.conf

@@ -0,0 +1,4 @@
+Section "Monitor"
+	Identifier "DSI-1"
+	Option "Rotate" "right"
+EndSection

extra/droid4/etc/X11/xorg.conf.d/40-ts.conf

@@ -0,0 +1,6 @@
+Section "InputClass"
+        Identifier      "calibration"
+        MatchProduct    "Atmel maXTouch Touchscreen"
+        Option  "Calibration"   "-5 964 1026 -7"
+        Option  "SwapAxes"      "1"
+EndSection

extra/droid4/etc/rc.local

@@ -0,0 +1,18 @@
+#!/bin/sh -e
+#
+# rc.local
+#
+# This script is executed at the end of each multiuser runlevel.
+# Make sure that the script will "exit 0" on success or any other
+# value on error.
+#
+# In order to enable or disable this script just change the execution
+# bits.
+
+## regen ssh keys on first boot
+[ -f /etc/ssh/ssh_host_rsa_key.pub ] || ssh-keygen -A
+
+# droid4 lcd brightness
+echo 200 > /sys/class/backlight/lcd/brightness
+
+exit 0