added clean.perf to the clean command.
added clean.perf to the clean command.

rasata/falcor,jhamlet/falcor,orneryhippo/falcor,sorrycc/falcor,sdesai/falcor,darioajr/falcor,nicolasartman/falcor,kk9599/falcor,beni55/falcor,sorrycc/falcor,nicolasartman/falcor,Swatinem/falcor,kk9599/falcor,samarpanda/falcor,Netflix/falcor,darioajr/falcor,jhamlet/falcor,michaelbpaulson/falcor,oaleynik/falcor,Swatinem/falcor,orneryhippo/falcor,rasata/falcor,samarpanda/falcor,oaleynik/falcor,michaelbpaulson/falcor,beni55/falcor,jontewks/falcor,Netflix/falcor,sdesai/falcor,jontewks/falcor