/usr/lib/x86_64-linux-gnu/libosmoabis.so is in libosmo-abis-dev 0.3.2+20151106git86fc3c8-3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libosmoabis.so.5.0.0
/usr/lib/x86_64-linux-gnu/libosmoabis.so.5.0.0