build: (minor) When only dbgsym fails to build, a rebuild succeeds

[wdoekes]

Description

When testing SONIC_DEBUGGING_ON=y we noticed that dbgsym packages would not get built. See #19.

But, doing another build will find the .deb file (ignore the lack of the dbgsym deb file) and carry on.

This could be seen as an advantage, but I rather see it as a dependency issue: if a build succeeds only when 2 products (regular + dbgsym deb) are created, it should not be allowed to continue if there is only 1 end product.

Which build are we running (if any)

master (2024-11-07)

Upstream issues/PRs