Remove the debug tag.

iptables are now needed by all products.
It should be added to core.mk.

Change-Id: Ie1f3a83b0e0ba15482b7b76c81ada3bf8faf6096
diff --git a/iptables/Android.mk b/iptables/Android.mk
index 61fe849..b50976e 100644
--- a/iptables/Android.mk
+++ b/iptables/Android.mk
@@ -19,8 +19,6 @@
 LOCAL_SRC_FILES:= \
 	xtables.c xtoptions.c
 
-
-LOCAL_MODULE_TAGS:=
 LOCAL_MODULE:=libxtables
 
 include $(BUILD_STATIC_LIBRARY)
@@ -43,8 +41,7 @@
 LOCAL_SRC_FILES:= \
 	iptables-standalone.c iptables.c xshared.c
 
-
-LOCAL_MODULE_TAGS:=debug
+LOCAL_MODULE_TAGS := optional
 LOCAL_MODULE:=iptables
 
 LOCAL_STATIC_LIBRARIES := \
@@ -71,8 +68,7 @@
 LOCAL_SRC_FILES:= \
 	ip6tables-standalone.c ip6tables.c xshared.c
 
-
-LOCAL_MODULE_TAGS:=debug
+LOCAL_MODULE_TAGS := optional
 LOCAL_MODULE:=ip6tables
 
 LOCAL_STATIC_LIBRARIES := \