add base files for

- assigning IP 192.168.1.1 per default to usb0-interface (usb-ethernet-gadget)
 - add mountpoint for 1st partrition of sd-card - prelimary for testing purposes

target/linux/xburst/base-files/etc/config/fstab

@@ -0,0 +1,6 @@
+config mount
+	option target   /card
+	option device   /dev/mmcblk0p1
+	option fstype   auto
+	option options  rw,sync
+	option enabled  1

target/linux/xburst/base-files/etc/config/network

@@ -0,0 +1,13 @@
+# Copyright (C) 2006 OpenWrt.org
+
+config interface loopback
+	option ifname	lo
+	option proto	static
+	option ipaddr	127.0.0.1
+	option netmask	255.0.0.0
+
+config interface lan
+	option ifname	usb0
+	option proto	static
+	option ipaddr	192.168.1.1
+	option netmask	255.255.255.0