Adding a performance test for multidimensional arrays and array of arrays
performance as compared to that of C array of arrays (C and C++ consider
multidimensional and array of arrays to be the same thing, C# does not)

Added this test to the graph files



git-svn-id: svn+ssh://svn.code.sf.net/p/chapel/code/trunk@22543 3a8e244f-b0f2-452b-bcba-4c88e055c3ca
Do not send mail to $user@cray.com for headless runs of nightly.

r: bradcray

git-svn-id: svn+ssh://svn.code.sf.net/p/chapel/code/trunk@22544 3a8e244f-b0f2-452b-bcba-4c88e055c3ca