board/common: add simple 'hostnm' script to change system hostname

Signed-off-by: Joachim Wiberg <troglobit@gmail.com>

board/common/rootfs/bin/hostnm

@@ -0,0 +1,16 @@
+#!/bin/sh
+# Changes hostname in /etc/hostname and /etc/hosts
+
+current=$(cat /etc/hostname)
+newname=$1
+
+[ -n "$newname" ] || exit 1
+
+sed -i "s/$current/$newname/" /etc/hosts
+sed -i "s/$current/$newname/" /etc/hostname
+
+hostname $newname
+
+initctl touch sysklogd
+initctl touch dnsmasq
+initctl reload