Shorten long dataset names in cmp-bench-json.py
Shorten long dataset names in cmp-bench-json.py

diku-dk/futhark,diku-dk/futhark,HIPERFIT/futhark,HIPERFIT/futhark,diku-dk/futhark,diku-dk/futhark,diku-dk/futhark,HIPERFIT/futhark