net/mlx: version rdma-core glue libraries

When built as separate objects, these libraries do not have unique names.
Since they do not maintain a stable ABI, loading an incompatible library
may result in a crash (e.g. in case multiple versions are installed).

This patch addresses the above by versioning glue libraries, both on the
file system (version suffix) and by comparing a dedicated version field
member in glue structures.

Signed-off-by: Adrien Mazarguil <adrien.mazarguil@6wind.com>