meta-google: google-usb-network: Set ifname correctly

We want the interface name on the system to reflect the name given as an
argument to the script

Change-Id: I00b2d28096aa3e6ef1332ef325a72f3c0f5283e8
Signed-off-by: William A. Kennington III <wak@google.com>
diff --git a/meta-google/recipes-google/networking/google-usb-network/usb_network.sh b/meta-google/recipes-google/networking/google-usb-network/usb_network.sh
index 3c38fb4..a135465 100755
--- a/meta-google/recipes-google/networking/google-usb-network/usb_network.sh
+++ b/meta-google/recipes-google/networking/google-usb-network/usb_network.sh
@@ -89,6 +89,8 @@
     ln -s "${func_dir}" "${config_dir}"
 
     echo "${BIND_DEVICE}" > ${gadget_dir}/UDC
+    ip link set dev "$(<"${func_dir}"/ifname)" down
+    ip link set dev "$(<"${func_dir}"/ifname)" name "${IFACE_NAME}"
 }
 
 gadget_stop() {