libdwarf: 20180129 -> 20180527

Semi-automatic update generated by https://github.com/ryantm/nixpkgs-update tools.

This update was made based on information from https://repology.org/metapackage/libdwarf/versions.

These checks were done:

- built on NixOS

- 0 of 0 passed binary check by having a zero exit code.
- 0 of 0 passed binary check by having the new version present in output.
- directory tree listing: https://gist.github.com/f01c7fbc7b0fe38bc2acb32c6c50579a
- du listing: https://gist.github.com/bdb3dce51992e14599317260f681383e