Added unit test suite for process functions (try 3)

[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
http://testbot.winehq.org/JobDetails.pl?Key=7294

Your paranoid android.


=== WVISTAADM (32 bit process) ===
process.c:133: Test failed: _pclose should return after 2 seconds, but it returned after 6 seconds

=== W2K8SE (32 bit process) ===
process.c:133: Test failed: _pclose should return after 2 seconds, but it returned after 6 seconds