byacc: 20180525 -> 20180609

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

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

These checks were done:

- built on NixOS
- /nix/store/rngxfbcnpk0n5v16msm7dhg609xfg5jp-byacc-20180609/bin/yacc passed the binary check.
- 1 of 1 passed binary check by having a zero exit code.
- 0 of 1 passed binary check by having the new version present in output.
- found 20180609 with grep in /nix/store/rngxfbcnpk0n5v16msm7dhg609xfg5jp-byacc-20180609
- directory tree listing: https://gist.github.com/a6550f00724283aca52496de32c95794
- du listing: https://gist.github.com/85e15144de69a0381160d89701d1b858

pkgs/development/tools/parsing/byacc/default.nix

@@ -2,14 +2,14 @@
 
 stdenv.mkDerivation rec {
   name = "byacc-${version}";
-  version = "20180525";
+  version = "20180609";
 
   src = fetchurl {
     urls = [
       "ftp://ftp.invisible-island.net/byacc/${name}.tgz"
       "https://invisible-mirror.net/archives/byacc/${name}.tgz"
     ];
-    sha256 = "1ridghk1xprxfg2k8ls87wjc00i4a7f39x2fkswfqb2wwf5qv6qj";
+    sha256 = "173l9yai5yndbyn8nzdl6q11wv4x959bd0w392i82nfsqcz0pfsv";
   };
 
   doCheck = true;