Update to Firebird 3.0

[Rene Engelhard]

On Sun, Jun 05, 2016 at 12:32:57PM +0200, Bunth Tamás wrote:
> Or we should put the libEngine12.so/dll file next to the libfbclient
> file. That can be done in builds/posix/make.defaults I think.

"proper" Firebird packaging is different:

https://packages.debian.org/search?searchon=contents&keywords=libEngine12.so&mode=path&suite=experimental&arch=any:

/usr/lib/firebird/3.0/plugins/libEngine12.so	firebird3.0-server

whereas fbclient is in /usr/lib:

see https://packages.debian.org/search?searchon=contents&keywords=libfbclient&mode=filename&suite=experimental&arch=any

So I believe our custom-built firebird should be able to find it (and be
it in some plugins/ directory...)

Regards,

Rene