dmd-testsuite updated to 2.061

[David Nadlinger]

I just pushed a branch to the dmd-testsuite repo containing the 
updates from 2.061 folded into our ldc branch: 
https://github.com/ldc-developers/dmd-testsuite/tree/ldc-merge-2.061

There were a bunch conflicts to manually resolve because I 
couldn't submit the RESULTS_DIR changes back upstream yet (the 
problem is that just using an env var this way doesn't work on 
Windows – should be a one-liner in d_do_test, but didn't get 
around to it yet).

Now we just need to get all the tests to pass… ;)

David