debian/control: rename bmap-tools -> bmaptool following upstream naming

Hi Andrej (sorry i butched your name in my last mail),

here is the MR we talked about. Thank you for considering this!

Unrelated to this issue, I think I'm currently in good contact with bmaptool upstream and recently got quite a large pull request merged which should also fix #1085561 by generating the GPG key on-demand: https://github.com/yoctoproject/bmaptool/pull/31

Closes: #1076501