Benchmark Collection

A collection for different irregular benchmarks.

Including:

• GAPBS: gaps GAP Benchmark Suite (Commit 0fb6a472)
• HPCG: hpcg-3.1 High Performance Conjugate Gradient Benchmark (Revision 3.1)
• NPB: NPB3.3.1 NAS Parallel Benchmark (Version 3.3) SourceLink
• serial: serial_workload serial implements