zte's code,first commit

Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/ap/os/linux/linux-3.4.x/drivers/net/xen-netback/Makefile b/ap/os/linux/linux-3.4.x/drivers/net/xen-netback/Makefile
new file mode 100644
index 0000000..e346e81
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/net/xen-netback/Makefile
@@ -0,0 +1,3 @@
+obj-$(CONFIG_XEN_NETDEV_BACKEND) := xen-netback.o
+
+xen-netback-y := netback.o xenbus.o interface.o