c910-diff

Compare the latest C910 coremark ref vs wolf logs, decide whether outputs are equivalent, and iteratively instrument RTL and rerun make run_c910_diff to find wolf-sv-parser introduced mismatches. Use when investigating mismatches between build/logs/c910/c910_ref_coremark_*.log and build/logs/c910/c910_wolf_coremark_*.log or when run_c910_diff results are not equivalent.