Review request: 8004657: Add hooks to javac to enable reporting dependency information.

[Fredrik Öhrström]

> 
> Log.setOut is redundant.   Log.setWriters already exists with the same functionality.
> 
> -- Jon

Thanks! Fixed. New webrev is here:

http://cr.openjdk.java.net/~ohrstrom/webrev-8004657-javac_hooks-v2