[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:
compile_time: 49.6176
exec_time: 5.0120
Maximum resident set size (kbytes): 356016

Patch by Ji Seung "Anna" Kim, thanks!

Differential Revision: https://reviews.llvm.org/D36709

git-svn-id: https://llvm.org/svn/llvm-project/test-suite/trunk@310975 91177308-0d34-0410-b5e6-96231b3b80d8
35 files changed