RFR: JDK-8172037: Change log message of SetupCopyFiles

[Tim Bell]

Erik:

> The makefile macro SetupCopyFiles is sometimes used for other things
> than simple copying. In those cases, it would be helpful to also change
> the log message that the generated recipes print to reflect that. This
> patch adds such an option to the macro and applies different messages
> where appropriate.
>
> One could argue that the name of the macro is misleading given it's
> broadened usage, but I chose not to tackle that problem with this bug.
> That may happen later.
>
> Bug: https://bugs.openjdk.java.net/browse/JDK-8172037
>
> Webrev: http://cr.openjdk.java.net/~erikj/8172037/webrev.01/


Looks good.

/Tim