The number used in debian packaging is actually current-age, which is
still 0 in this case after it was bumped a while ago.
As a result, we had a libosmoctrl1_*.deb package installing a
libosmoctrl.so.0 file.
Fixes: OS#3175
Change-Id: I771f6c68570bc3b2bab68e1165c7284fd43e904d
Enable multi-arch support in libosmocore. This means the package
can not be built on squeeze anymore.
The concept of "foreign" is not really well documented but I
think I use it correctly here.
libosmogsm: the transition from 5 to 6 wasn't done properly. Fixed version number.
libosmoctrl: missing definition in debian/control and also missing libosmoctrl0.install.