protobuf3_4: init at 3.4.0

pkgs/development/libraries/protobuf/3.4.nix

···
+{ callPackage, lib, ... }:
+
+lib.overrideDerivation (callPackage ./generic-v3.nix {
+  version = "3.4.0";
+  sha256 = "0385j54kgr71h0cxh5vqr81qs57ack2g2k9mcdbq188v4ckjacyx";
+}) (attrs: { NIX_CFLAGS_COMPILE = "-Wno-error"; })

pkgs/top-level/all-packages.nix

···
   protobuf3_1 = callPackage ../development/libraries/protobuf/3.1.nix { };
   protobuf3_2 = callPackage ../development/libraries/protobuf/3.2.nix { };
   protobuf3_3 = callPackage ../development/libraries/protobuf/3.3.nix { };
+  protobuf3_4 = callPackage ../development/libraries/protobuf/3.4.nix { };
   protobuf2_6 = callPackage ../development/libraries/protobuf/2.6.nix { };
   protobuf2_5 = callPackage ../development/libraries/protobuf/2.5.nix { };
 

pkgs/top-level/python-packages.nix

···
   });
 
   protobuf = self.protobuf2_6;
+  # only required by tensorflow
+  protobuf3_4 = callPackage ../development/python-modules/protobuf.nix {
+    disabled = isPyPy;
+    doCheck = !isPy3k;
+    protobuf = pkgs.protobuf3_4;
+  };
   protobuf3_3 = callPackage ../development/python-modules/protobuf.nix {
     disabled = isPyPy;
     doCheck = !isPy3k;