Introduce fwmarkd: a service to set the fwmark of sockets.

Change-Id: Ieb049fe34ea2b21a7f6108f2099d1a8b8f2c28f7
diff --git a/rootdir/init.rc b/rootdir/init.rc
index 833b96d..476daff 100644
--- a/rootdir/init.rc
+++ b/rootdir/init.rc
@@ -518,6 +518,7 @@
     socket netd stream 0660 root system
     socket dnsproxyd stream 0660 root inet
     socket mdns stream 0660 root system
+    socket fwmarkd stream 0660 root inet
 
 service debuggerd /system/bin/debuggerd
     class main