Fix some syntax issues with IP command.

Was not building secondary tables properly.  Also IPv6 host routes
were failing.

bug:5615697
Change-Id: I0d5ad2ed7d13e4d5bd8c2f8ce15fc0ccb36a4690
diff --git a/NatController.h b/NatController.h
index d10cbd9..eae32b4 100644
--- a/NatController.h
+++ b/NatController.h
@@ -40,6 +40,7 @@
     int runCmd(const char *path, const char *cmd);
     bool checkInterface(const char *iface);
     int setForwardRules(bool set, const char *intIface, const char *extIface);
+    const char *getVersion(const char *addr);
 };
 
 #endif