RFR: 8252233: Enable debug-image target to support producing a pure debug image package

[Severin Gehwolf]

Hi Andrew,

On Thu, 2020-08-27 at 16:55 +0100, Andrew Leonard wrote:
> Hi,
> Please may I request a sponsor and review for this build enhancement to 
> provide a pure debug "image", for those developers that want to accompany 
> a straight jdk image with a debug-image when needed:
>     https://bugs.openjdk.java.net/browse/JDK-8252233
>     webrev: http://cr.openjdk.java.net/~aleonard/8252233/webrev.00/

Not really a review...

If I understand this correctly it's an image of only *debugsymbols* for
native files, right? debug-image as a name seems a bit confusing to me.
There is already a concept of 'release', 'fastdebug' and 'slowdebug'
builds for HotSpot. Perhaps calling it debugsymbols-image would make
more sense?

Thanks,
Severin