--sizes option outputs to stderr

[Guilherme Soares]

I don't know if this is the intended behaviour but when running java -jar dacapo/dacapo-23.11-chopin.jar --sizes avrora the output gets printed to stderr instead of stdout which seems wrong/unintuitive.

To reproduce:

java -jar dacapo/dacapo-23.11-chopin.jar --sizes avrora 2>error doesn't print size info

[Steve Blackburn]

Thanks. Fixed.