[phobos] std.parallelism

[David Simcha]

Ok, I got my acct. on the FreeBSD64 auto tester box (the one were the 
most failures were occurring) and ran through the std.parallelism unit 
tests in a loop about 10,000 times.  Everything passed.  I therefore 
think that either there's some obscure bug in global locks and/or 
appending to an Appender from multiple threads while locking manually 
(which I removed from the unit test recently) or there's some obscure 
bug in some initialization code that only runs once even when I run the 
main unit test in a loop.  Please keep me posted if anyone has any 
further trouble with std.parallelism.