Update liberasurecode 1.5.0 -> 1.6.1

Necessary fixes:
https://github.com/frugalos/liberasurecode/blob/master/liberasurecode.patch (follow changes of the upstream)
- `zlib` is introduced in the dependencies

Changes in the upstream: [1.5.0...1.6.1](https://github.com/openstack/liberasurecode/compare/1.5.0...1.6.1#diff-02f0b547c2779d25cff89672135f20e3)
