ebtables: Convert to standalone build

 * There is no need to create 20 shared libraries on an Android
   build. Convert to a standalone build to eliminate this noise.
 * Additionally, the scriptage in the Android makefile causes
   Ninja to regenerate it's configuration for every build. Fix it.
 * These files can be generated by the standard makefile as part
   of the "static" target.

Change-Id: I1de9f93caf563c10f49c72a884b4c96aaf5335e0
diff --git a/extensions/ebt_ip6.c b/extensions/ebt_ip6.c
index 0465e77..7e65d76 100644
--- a/extensions/ebt_ip6.c
+++ b/extensions/ebt_ip6.c
@@ -556,7 +556,7 @@
 	.extra_ops	= opts,
 };
 
-void _init(void)
+void _ip6_init(void)
 {
 	ebt_register_match(&ip6_match);
 }