RFR: JDK-8155632: Remove debuginfo from jmod files

[Mandy Chung]

> On Apr 28, 2016, at 6:22 AM, Erik Joelsson <erik.joelsson at oracle.com> wrote:
> 
> The jmod files currently contain debug information and it has been concluded that they shouldn't. This patch filters out the debug information from the jmod files and adds a new build step in images to copy the appropriate set of debuginfo into the images. Note that this patch does not aim on changing the way we handle debuginfo in any other way. This will be attacked more in depth in JDK-8150009, which in turn depends on JDK-8136777.
> 
> Bug: https://bugs.openjdk.java.net/browse/JDK-8155632
> Webrev: http://cr.openjdk.java.net/~erikj/8155632/webrev.top.01/


Looks good.  Thanks for taking on this and this change will reduce the download size significantly.

Mandy