capture-libs: Improve logging
Reviewed-by: @evelikov, on https://gitlab.steamos.cloud/steamrt/steam-runtime-tools/-/merge_requests/576
Tested-by: @evelikov
Reviewed-by: @evelikov, on https://gitlab.steamos.cloud/steamrt/steam-runtime-tools/-/merge_requests/576
Tested-by: @evelikov