Fix compilation failure for ubuntu 3.13.0-36-generic (and above)

From 3.13.0-36, ubuntu did

while keeping the kernel version the same as 3.13.0-32. The only option
that was left then was to check for definition of skb_get_rxhash

Change-Id: Idd76936ee87904f37af17528dc9df88194fb2110
Closes Bug:1373574
IPv6 changes
(on behalf of Prabhakaran)

Change-Id: I16d47e843bbe85b7de8438205c76ae29d41c14a5
Fix build issue in mainline

Change-Id: If62ea3f0c554da7e6d52f7d4f0f23f5a6de7214e