New UDP definitions in Linux 3.16

[David Miller]

From: "Joseph S. Myers" <joseph@codesourcery.com>
Date: Tue, 9 Sep 2014 23:12:02 +0000

> Linux 3.16 adds constants UDP_NO_CHECK6_TX and UDP_NO_CHECK6_RX to 
> uapi/linux/udp.h.  Do we want to add these to sysdeps/gnu/netinet/udp.h?  
> (I suspect, notwithstanding the location of that file, some of the 
> constants there are actually Linux-specific, maybe with the expectation 
> that other OSes should use the same numbers if they adopt those features.)

They should probably be added.