Bug#909306: qt3d5-dev: Qt53DExtrasConfig.cmake missing

[Philipp Marek <philipp@marek.priv.at>]

> We do not ship the Qt 3D Extras module because it is considered 
> unstable
> by upstream. Quoting from [1]:
>
>   This module is under development and is subject to change.
...
> We will ship it again once upstream declares it stable.
Thank you for the answer!

But as this is only useful for developers, why not just include it
anyway? Not having it is worse than having a possibly changing
version; when compiling other projects I need one, and if a newer
QT version becomes incompatible to the other software there's still
no more problem than if it is included.

The _important_ part is IMO to keep the local binaries and their
dev files consistent; that could be accomplished by shipping the
required dev files.


If there's some incompatible change, it's good when I notice via
a compile error; I can just use archive.debian.org to go back
anyway.
Much better than having to _manually_ keep the library and dev
environment in sync (and failing to do so half of the time!)


Please re-include it; by running testing/unstable we developers
implicitly acknowledge incompatible changes already.


Regards,

Phil