Switch to toybox ifconfig.

Change-Id: Ifef0cc12d1edc8ad8647919343035f7966dfc621
diff --git a/Android.mk b/Android.mk
index 552c55c..b10f8fb 100644
--- a/Android.mk
+++ b/Android.mk
@@ -187,7 +187,7 @@
 
 LOCAL_MODULE := toybox
 
-# dupes: chown cmp date df du grep id ifconfig ls
+# dupes: chown cmp date df du grep id ls
 #        mount nc netcat renice
 #        touch umount
 # useless?: chvt freeramdisk fsfreeze install makedevs mkfifo mktemp nbd-client
@@ -226,6 +226,7 @@
     groups \
     head \
     hostname \
+    ifconfig \
     inotifyd \
     insmod \
     kill \