RFR: JDK-8172037: Change log message of SetupCopyFiles

[Erik Joelsson]

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/

/Erik