build: bump library soname to 3.0
build: bump library soname to 3.0

Our shared library API can now be considered stable.

By no means the code is bug free or feature complete but it is one step
forward towards 3.0 release.

Signed-off-by: Fabio M. Di Nitto <510df3d038b805d3c95a0d349043a42f16d04605@redhat.com>

asp24/resource-agents,asp24/resource-agents,stevenraspudic/resource-agents,stevenraspudic/resource-agents,stevenraspudic/resource-agents,asp24/resource-agents