[PATCH] ws2_32/tests: Add test for completion notification flags.

[Marvin]

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=43561

Your paranoid android.


=== debian9 (32 bit Wine report) ===

ws2_32:
sock.c:3049: Test failed: Test[1]: expected 2, got 0
sock.c:3049: Test failed: Test[2]: expected 2, got 0
sock.c:3049: Test failed: Test[1]: expected 2, got 0
sock.c:3049: Test failed: Test[2]: expected 2, got 0

=== debian9 (build log) ===