Automatically add bob.devtools to the output of bdt gitlab changelog

Since successful release of packages is based on releasing bob.devtools first, it makes sense to add it to the output of changelog always.

You mean the version number of this package?

No, when you call bdt gitlab changelog, it should always put the changelog of bob.devtools first. This way, bob.devtools is always released before releasing other packages. I have a fix for this locally.

mentioned in merge request !145 (merged)

(DRY?) Why would you be repeating the changes? They are listed here already: https://gitlab.idiap.ch/bob/bob.devtools/-/tags

Maybe you can place a link to it?

closed via merge request !145 (merged)

mentioned in commit 35535739