configure.ac: Depend on latest tagged/released libosmo-* versions

This is the safe choice, as in absence of automatic testing we don't
know if we actually still build against the [sometimes] ancient
dependencies.  Would be great to automatize this, but until we have that,
better be safe.

Change-Id: Idf5cad1dc17a5136d00c970c326cdf3b7ee18e3c
1 file changed