add continuous build for helloworld examples

release.nix

@@ -1,5 +1,9 @@
 { pkgs ? import <nixpkgs> {}}:
 let
   derivations = import ./derivations.nix { inherit pkgs; };
+  jobs = derivations // {
+    helloworld_ecp5 = import ./examples/helloworld_ecp5.nix { inherit pkgs; };
+    helloworld_kintex7 = import ./examples/helloworld_kintex7.nix { inherit pkgs; };
+  };
 in
-  builtins.mapAttrs (name: value: pkgs.lib.hydraJob value) derivations
+  builtins.mapAttrs (name: value: pkgs.lib.hydraJob value) jobs