When running a build in the chroot environment, there are occasionally
files that you must retrieve from the chroot that are not part of the
normal build. For example, some files that you may need to get back
would include test results, auto-generated files, etc.
Set this variable in order to get the files back from the chroot build
environment.
The files that are retrieved will also automatically be archived as well
with the other build results.
This must be a comma-separated list; spaces are allowed.