build-rootfs: new script to build all rootfs tarballs.

build-rootfs.sh.in

@@ -0,0 +1,9 @@
+#!/bin/sh
+
+set -e
+
+PLATFORMS="beaglebone cubieboard2 odroid-u2 rpi rpi2"
+
+for f in ${PLATFORMS}; do
+	./mkrootfs.sh $f $@
+done