[PB-37] Update R script to plot written chars (wchar) and cpu time
[PB-37] Update R script to plot written chars (wchar) and cpu time

input-output-hk/cardano-sl,input-output-hk/pos-haskell-prototype,input-output-hk/cardano-sl,input-output-hk/cardano-sl,input-output-hk/pos-haskell-prototype,input-output-hk/cardano-sl,input-output-hk/pos-haskell-prototype