Added build script

build.sh

@@ -0,0 +1,10 @@
+#!/bin/sh
+
+SCRIPT=$(readlink -f $0)
+SCRIPTDIR=$(dirname $SCRIPT)
+
+git submodule init
+git submodule update
+
+make O=$SCRIPTDIR/output BR2_EXTERNAL=$SCRIPTDIR -C $SCRIPTDIR/buildroot $*
+