[patch] testsuite: pthread_cond_wait.exp: Avoid a race

[Joel Brobecker]

> It is just too racy.  I will check in the easy workaround below, it is
> sure not a real fix.

2 seconds feels much much much too long, however. I try to avoid
these types of delays, because collectively they make a significant
dent on the overall amount of time it takes to run the testsuite.

I am trying to think of a way to rewrite the program to avoid
the delay entirely, but I don't think it's possible, because
we need to the thread to run until it blocks in pthread_cond_wait.

Can we try a smaller value? For instance, if we went from 0.01
second to 0.1 seconds, we'd increase the time by a factor of 10.
In today's CPU times, 0.1 second enough to do a huge amount of
processing, no?

-- 
Joel