ws2_32/tests: Add tests for getsockopt() with SO_SNDBUF and SO_RCVBUF optname.

[Sebastian Lackner]

On 16.02.2016 05:10, Marvin wrote:
> Hi,
> 
> While running your changed tests on Windows, I think I found new failures.
> Being a bot and all I'm not very good at pattern recognition, so I might be
> wrong, but could you please double-check?
> Full results can be found at
> https://testbot.winehq.org/JobDetails.pl?Key=20513
> 
> Your paranoid android.
> 
> 
> === w7pro64 (32 bit sock) ===
> sock.c:7750: Test failed: bytesReturned isn't supposed to be 1
> sock.c:7774: Test failed: GetOverlappedResult failed, error 0
> 

This is an unrelated random failure.