[Debian-med-packaging] Bug#911793: Control: reassign -1 src:gdcm 2.8.7-2

[Mathieu Malaterre]

> This is a diff of a .symbols file I generated from libvtkgdcm2.8
> versions 2.8.7-1 and 2.8.7-2.

Thanks Mattia for tracking this issue !

As you've noticed the ABI breakage occur in between two minor uploads
-1 and -2. So I suspect this may confuse reader that bug be reported
against src:gdcm, since obviously not a single line change could have
occurred in between two minor uploads.

Trying to read the changelog of 2.8.7-2 I only find reference to py3
changes, however digging a bit in the d/control Deps I can see a
switch from vtk6 to vtk7:

https://salsa.debian.org/med-team/gdcm/commit/616785342cdfc6747125a3f505af0b985d4d8fee

Since libvtkgdcm2.8 is a c++ project, I suspect that any change of any
inherited c++ class will change the ABI. I would suggest that
libvtkgdcm2.8 be removed, and a new binary package libvtk7gdcm2.8 be
uploaded instead.