Bug#541024: FTBFS: build-dep on gone libmysqlclient15-dev package

[Riku Voipio <riku.voipio@iki.fi>]

Package: akonadi
Version: 1.2.0-1

Since version 5.1.37-1, libmysqlclient15-dev is gone. The package still
exists in the archive, but is uninstallable. Any package still build-depending
on libmysqlclient15-dev will FTBFS. This is filed against akonadi, since it
is blocking a bunch of other (kde) packages from building, and thus would
profit more from a urgent fix. But I'm sure there are other packages still
build-depenging on libmysqlclient15-dev too.. From the build logs:

Installing positive dependencies: cdbs debhelper cmake automoc quilt pkg-kde-tools libqt4-dev shared-mime-info libmysqlclient15-dev libxslt-dev libsoprano-dev xsltproc libdbus-1-dev libboost-program-options-dev
...
The following packages have unmet dependencies:
  libmysqlclient15-dev: Depends: libmysqlclient-dev (>= 5.1.36-5) but it is not going to be installed
E: Broken packages