o173: temporarily add sid deb-src lines to enable holger to do test builds for...

o173: temporarily add sid deb-src lines to enable holger to do test builds for his 2nd no-source-change NMU campaign targetting 708 sources without .buildinfo files found in unstable, including 475 in bookworm

Signed-off-by: Holger Levsen <holger@layer-acht.org>