Today the unpacked debug symbols are currently copied to a lot of different places in the build folder:
- the hotspot build
- the hotspot 'dist' folder
- the jdk folder
- several times in 'images'

We should be able to use symlinks for some of these. Maybe not for images, since you kind of expect to be able to move those around.

The unpacked symbol files are currently ~700MB for a "slowdebug" target on OS X, so symlinks would save around 1.5GB of data for each build. It would also lead to a quicker build.