[test-suite] Adding PENNANT
PENNANT is an unstructured mesh physics mini-app designed for advanced
architecture research. It contains mesh data structures and a few physics
algorithms adapted from the LANL rad-hydro code FLAG, and gives a sample of the
typical memory access patterns of FLAG.
On our Intel Xeon CPU E5-2699 v4 @ 2.20GHz:
Maximum resident set size (kbytes): 356016
Patch by Ji Seung "Anna" Kim, thanks!
Differential Revision: https://reviews.llvm.org/D36709