GDAL 2.0 soname bump

[Volker Fröhlich]

Hello!

GDAL 2.0 is here and we'll have to rebuild all dependent packages, once 
our build is ready. The API has changed quite a bit and there finally is 
a new soname version too!

http://svn.osgeo.org/gdal/branches/2.0/gdal/MIGRATION_GUIDE.TXT
http://upstream.rosalinux.ru/versions/gdal.html

I expect various builds to break. I guess we should try in COPR first. 
I'll let you know once we get there.

Greetings,

Volker Fröhlich