uboot: (firmwareOdroidC2/C4) don't invoke patch tool, use patches = [] instead

https://github.com/NixOS/nixpkgs/blob/master/pkgs/stdenv/generic/setup.sh#L948
this can do it nicely.

Signed-off-by: Anton Arapov <anton@deadbeef.mx>

nixos/modules/services/logging/heartbeat.nix

@@ -0,0 +1,74 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+  cfg = config.services.heartbeat;
+
+  heartbeatYml = pkgs.writeText "heartbeat.yml" ''
+    name: ${cfg.name}
+    tags: ${builtins.toJSON cfg.tags}
+
+    ${cfg.extraConfig}
+  '';
+
+in
+{
+  options = {
+
+    services.heartbeat = {
+
+      enable = mkEnableOption "heartbeat";
+
+      name = mkOption {
+        type = types.str;
+        default = "heartbeat";
+        description = "Name of the beat";
+      };
+
+      tags = mkOption {
+        type = types.listOf types.str;
+        default = [];
+        description = "Tags to place on the shipped log messages";
+      };
+
+      stateDir = mkOption {
+        type = types.str;
+        default = "/var/lib/heartbeat";
+        description = "The state directory. heartbeat's own logs and other data are stored here.";
+      };
+
+      extraConfig = mkOption {
+        type = types.lines;
+        default = ''
+          heartbeat.monitors:
+          - type: http
+            urls: ["http://localhost:9200"]
+            schedule: '@every 10s'
+        '';
+        description = "Any other configuration options you want to add";
+      };
+
+    };
+  };
+
+  config = mkIf cfg.enable {
+
+    systemd.tmpfiles.rules = [
+      "d '${cfg.stateDir}' - nobody nogroup - -"
+    ];
+
+    systemd.services.heartbeat = with pkgs; {
+      description = "heartbeat log shipper";
+      wantedBy = [ "multi-user.target" ];
+      preStart = ''
+        mkdir -p "${cfg.stateDir}"/{data,logs}
+      '';
+      serviceConfig = {
+        User = "nobody";
+        AmbientCapabilities = "cap_net_raw";
+        ExecStart = "${pkgs.heartbeat}/bin/heartbeat -c \"${heartbeatYml}\" -path.data \"${cfg.stateDir}/data\" -path.logs \"${cfg.stateDir}/logs\"";
+      };
+    };
+  };
+}