Bug#1014420: gimp: Missing gir dependencies

[Jeremy Bícha]

Control: severity -1 important

I'm downgrading the severity because the app does still run. But if
you run it from the command line, there are lots of errors like this:

Traceback (most recent call last):
  File "/usr/lib/x86_64-linux-gnu/gimp/2.99/plug-ins/python-console/python-console.py",
line 20, in <module>
    gi.require_version('Gimp', '3.0')
  File "/usr/lib/python3/dist-packages/gi/__init__.py", line 126, in
require_version
    raise ValueError('Namespace %s not available' % namespace)
ValueError: Namespace Gimp not available
GIMP-WARNING: gimp: gimp_wire_read(): error


Also, see my suggestion about whether it makes sense to reintroduce
the gimp-python binary package and then we could likely move this
dependency there.

Also, there are now JavaScript and Lua plugins. I explicitly disabled
them with my recent upload, in part because I don't know if we want
Gimp to depend on gjs and Lua or whether those plugins should be in a
separate binary package. (This should be a separate bug report but I'm
mentioning it here since it could be related.)

Thank you,
Jeremy Bícha