folly: 2019.06.17.00 -> 2019.07.22.00

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

pkgs/development/libraries/folly/default.nix

@@ -3,13 +3,13 @@
 
 stdenv.mkDerivation rec {
   name = "folly-${version}";
-  version = "2019.06.17.00";
+  version = "2019.07.22.00";
 
   src = fetchFromGitHub {
     owner = "facebook";
     repo = "folly";
     rev = "v${version}";
-    sha256 = "0v639yqk029c585x3140rdfbz3xrdjwc858bqfy4yv31pyrn608l";
+    sha256 = "1vh5jrqz0lp6rc5fr6vk3yqss5vaycdsyap12mcr0cniv419fdxa";
   };
 
   nativeBuildInputs = [ cmake ];