Place clatd ip routing rule into local table rather than main table
as the main table is not used for routing when per-network tables
are being used and clatd's rule is for locally destined packets.

Change-Id: I243397b57c946f4af4c2439242b90208b01e84f0
diff --git a/setroute.c b/setroute.c
index cffee9f..f9dc365 100644
--- a/setroute.c
+++ b/setroute.c
@@ -61,7 +61,7 @@
 
   memset(&rt, 0, sizeof(rt));
   rt.rtm_family = family;
-  rt.rtm_table = RT_TABLE_MAIN;
+  rt.rtm_table = RT_TABLE_LOCAL;
   rt.rtm_dst_len = prefixlen;
   switch(change_type) {
     case ROUTE_DELETE: