folly: 2018.04.16.00 -> 2018.04.23.00

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

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

These checks were done:

- built on NixOS
- Warning: no binary found that responded to help or version flags. (This warning appears even if the package isn't expected to have binaries.)
- found 2018.04.23.00 with grep in /nix/store/gdpqjqzr8vyisbqsklghaj7lzbbld8a7-folly-2018.04.23.00
- directory tree listing: https://gist.github.com/07bd48be1a92119ed9366c9d83b6a9d1

pkgs/development/libraries/folly/default.nix

@@ -3,13 +3,13 @@
 
 stdenv.mkDerivation rec {
   name = "folly-${version}";
-  version = "2018.04.16.00";
+  version = "2018.04.23.00";
 
   src = fetchFromGitHub {
     owner = "facebook";
     repo = "folly";
     rev = "v${version}";
-    sha256 = "10wivnszpqcbg2hbvfal94lcjw20pjz0d8p0m4qa7i4v4z90q37p";
+    sha256 = "0wfp4pxi71bi3bz3h5jxsvdd5wa8q6wqdgsx0jvyvaiiy7v884sv";
   };
 
   nativeBuildInputs = [ autoreconfHook python pkgconfig ];