ip: Add LOCAL_MODULE_TAGS := optional

Change-Id: Ie1a5a18e6e5a11cfd573c6bc789b3ec8d0e86e46
Signed-off-by: Dmitry Shmidt <dimitrysh@google.com>
diff --git a/ip/Android.mk b/ip/Android.mk
index 5901c3b..f3a41b1 100644
--- a/ip/Android.mk
+++ b/ip/Android.mk
@@ -9,6 +9,8 @@
 
 LOCAL_MODULE := ip
 
+LOCAL_MODULE_TAGS := optional
+
 LOCAL_SHARED_LIBRARIES := libc libm libdl
 
 LOCAL_SHARED_LIBRARIES += libiprouteutil libnetlink