Bug#815102: linux-perf-4.4 conflicts with linux-perf-4.3

[Felipe Balbi <balbi@kernel.org>]

Package: linux-perf-4.4
Version: 4.4-1
Severity: grave
Justification: renders package unusable

Dear Maintainer,

*** Reporter, please consider answering these questions, where appropriate ***

   * What led up to the situation?

apt-get dist-upgrade

   * What exactly did you do (or not do) that was effective (or
     ineffective)?

tried a dist-upgrade and while unpacking linux-perf-4.4, dpkg complains that it can't overwrite
/usr/share/perf-core/strace/groups/file which is also present on linux-perf-4.3

   * What was the outcome of this action?

linux-perf-4.4 can't be installed

   * What outcome did you expect instead?

both linux-perf 4.3 and 4.4 should be able to be installed together on a system
and they should be usable depending on which kernel is running.

Here's relevant output from apt-get dist-upgrade:

Unpacking linux-perf-4.4 (4.4-1) ...
dpkg: error processing archive /var/cache/apt/archives/linux-perf-4.4_4.4-1_amd64.deb (--unpack):
 trying to overwrite '/usr/share/perf-core/strace/groups/file', which is also in package linux-perf-4.3 4.3.1-2



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-- System Information:
Debian Release: stretch/sid
  APT prefers unstable
  APT policy: (500, 'unstable'), (1, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386, armhf

Kernel: Linux 4.3.0-1-amd64 (SMP w/8 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)