Bug#1106083: scilab: FTBFS: autobuilder hangs when using the kernel of trixie

[Santiago Vila]

Hello.

For some reason, the hang does not happen (0% failure rate in bookworm)
or it happens a lot less (10% failure rate in trixie) when building
on single-CPU systems.

So, I'm going to try adding --max-parallel=1 to dh call to see
if that improves things. If it does, I'll make a team upload
with such minor change.

(But help is still welcome to investigate the underlying problem,
please contact me privately if you need a VM to reproduce).

Thanks.