Add ip6-localhost to /system/etc/hosts.

Bug: 18791191
Change-Id: Id7cad8cfccadeb319f0dc7dcba8148a457f9f87d
diff --git a/rootdir/etc/hosts b/rootdir/etc/hosts
index 99848f6..649151c 100644
--- a/rootdir/etc/hosts
+++ b/rootdir/etc/hosts
@@ -1 +1,2 @@
-127.0.0.1		    localhost
+127.0.0.1       localhost
+::1             ip6-localhost