I am adding the cfd-mini tests for chapel
Adding in a graph file and updating GRAPHFILES to include cfd-mini
Merge pull request #596 from cathieO/master

Addition of cfd-mini to performance tests

[Merging on behalf of Cathie who writes the following]

I have included the serial version of cfd-mini for performance testing.
This version performs slightly faster than the naive c version and slightly slower than the optimized serial c version.