isisd: add support to import routes from other protocols

Signed-off-by: Christian Franke <chris@opensourcerouting.org>
diff --git a/lib/routemap.h b/lib/routemap.h
index ba64553..2479c81 100644
--- a/lib/routemap.h
+++ b/lib/routemap.h
@@ -47,7 +47,8 @@
   RMAP_OSPF,
   RMAP_OSPF6,
   RMAP_BGP,
-  RMAP_ZEBRA
+  RMAP_ZEBRA,
+  RMAP_ISIS,
 } route_map_object_t;
 
 typedef enum