generate new partition graphinfo files

Example:

source rrfs-workflow/workflow/tools/load_rrfs.sh
module load metis
gpmetis -minconn -contig -niter=200 conus3km.graph.info 80
gpmetis -minconn -contig -niter=200 conus3km.graph.info 40
...

Note:

1. 80, 40 are the target numbers of PEs, replace with your own target number.
2. replace conus3km.graph.info with your "graph.info" file.