Bug#912852: Package installs completions files into obsolete directory

[Gabriel F. T. Gomes]

Package: grub2
Version: 2.02+dfsg1

The completions file for grub2 are being installed into the obsolete
directory, /etc/bash_completion.d/, when they should be installed under
the default directory, /usr/share/bash-completion/completions.

The reason for this is that the obsolete directory is hardcoded:

    $ dget http://http.debian.net/debian/pool/main/g/grub2/grub2_2.02+dfsg1-8.dsc
    $ grep -RnE completion grub2-2.02+dfsg1/
    grub2-2.02+dfsg1/debian/grub-common.install.in:5:etc/bash_completion.d

I believe that the fix needs to be done in grub2, rather than in
bash-completion, as explained in bug report 811496, more specifically,
in message 83 [1].

Thanks,
Gabriel

[1] https://bugs.debian.org/811496#83