Since debuginfo enabled/disabled is per-linktarget, the rules need
to be per-linktarget as well, and so instead of one generic rule
there needs to be a define generating one rule per each linktarget.

Change-Id: I9423c4a86bc02aa3c0bf816f47e3c3d43ff03b23
Reviewed-on: https://gerrit.libreoffice.org/70370
Tested-by: Jenkins
Reviewed-by: Luboš Luňák <l.lunak@collabora.com>