go: 1.10.1 -> 1.10.2

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

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

These checks were done:

- built on NixOS
- ran ‘/nix/store/w2wgdl5ljbx1fq6iwlavrl4nzbchq954-go-1.10.2/bin/.go-wrapped help’ got 0 exit code
- ran ‘/nix/store/w2wgdl5ljbx1fq6iwlavrl4nzbchq954-go-1.10.2/bin/go help’ got 0 exit code
- found 1.10.2 with grep in /nix/store/w2wgdl5ljbx1fq6iwlavrl4nzbchq954-go-1.10.2
- directory tree listing: https://gist.github.com/249bfa4dc4d10281576f20de902e501a