Bug#809970: [linphone] fails to install

[Alex Goebel]

Package: linphone
Version: 3.6.1-2.4
Severity: serious

It seems with the recent rebuild for the libvpx transition, 
linphone-common somehow picked up a +b1 which is not in the versioned 
linphone-common depends of the other linphone packages.
..or something like that.

Also picked up by piuparts:
https://piuparts.debian.org/sid/source/l/linphone.html