tests/run-multitests.py: Read IP address from boot nic if available.

This works if your network is pre-configured in boot.py as an object called
"nic".  Without this, multitests expects to access the WLAN/LAN class which
isn't always correct.

Signed-off-by: Andrew Leech <andrew@alelec.net>

tests/run-multitests.py

@@ -62,6 +62,9 @@ class multitest:
         multitest.flush()
     @staticmethod
     def get_network_ip():
+        try:
+            ip = nic.ifconfig()[0]
+        except:
             try:
                 import network
                 if hasattr(network, "WLAN"):