Use fifo instead of Qthreads when testing on mac os version < 10.

Qthreads does not support mac os versions less than 10, so this updates smoke
and correctness tests to use fifo on the old mac used for chapel testing.
Add annotation for when we switched default to qthreads
Merge pull request #224 from lydia-duncan/updateAnnotationsForQthreads

Add annotation for when we switched default to qthreads [trivial]

Also organized that portion better chronologically.
Adding required .good file
Merge pull request #225 from benharsh/readUntil

Adding required .good file
Merge pull request #223 from thomasvandoren/test-with-fifo-on-old-mac

Use fifo instead of Qthreads when testing on mac os version < 10.

Qthreads does not support mac os versions less than 10, so this updates smoke
and correctness tests to use fifo on the old mac used for chapel testing.

reviewed by @ronawho