When creating the comps repo, use a separate log file for each variant
instead of overwriting the same global file again and again.
Signed-off-by: Lubomír Sedlář <lsedlar@redhat.com>
The configuration can specify a list of variants for which the original
comps file will be copied without any modification.
Signed-off-by: Lubomír Sedlář <lsedlar@redhat.com>