GHC 6.4.3 on FreeBSD

[Simon Marlow]

For the time being, I've committed a change that forces GHC to use -lthr on 
FreeBSD instead of whatever the default is (usually libpthread).  This works 
around the hangs for me.

If someone else on FreeBSD could verify this, I'd be grateful.  You need to 
check out the 6.4 branch from CVS:

   $ cvs co -r ghc-6-4-branch fpconfig
   $ cd fptools
   $ cvs up -d hslibs libraries ghc testsuite

Cheers,
	Simon