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/misc/felix.nix

@@ -0,0 +1,104 @@
+# Felix server
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+
+  cfg = config.services.felix;
+
+in
+
+{
+
+  ###### interface
+
+  options = {
+
+    services.felix = {
+
+      enable = mkEnableOption "the Apache Felix OSGi service";
+
+      bundles = mkOption {
+        type = types.listOf types.package;
+        default = [ pkgs.felix_remoteshell ];
+        defaultText = literalExpression "[ pkgs.felix_remoteshell ]";
+        description = "List of bundles that should be activated on startup";
+      };
+
+      user = mkOption {
+        type = types.str;
+        default = "osgi";
+        description = "User account under which Apache Felix runs.";
+      };
+
+      group = mkOption {
+        type = types.str;
+        default = "osgi";
+        description = "Group account under which Apache Felix runs.";
+      };
+
+    };
+
+  };
+
+
+  ###### implementation
+
+  config = mkIf cfg.enable {
+    users.groups.osgi.gid = config.ids.gids.osgi;
+
+    users.users.osgi =
+      { uid = config.ids.uids.osgi;
+        description = "OSGi user";
+        home = "/homeless-shelter";
+      };
+
+    systemd.services.felix = {
+      description = "Felix server";
+      wantedBy = [ "multi-user.target" ];
+
+      preStart = ''
+        # Initialise felix instance on first startup
+        if [ ! -d /var/felix ]
+        then
+          # Symlink system files
+
+          mkdir -p /var/felix
+          chown ${cfg.user}:${cfg.group} /var/felix
+
+          for i in ${pkgs.felix}/*
+          do
+              if [ "$i" != "${pkgs.felix}/bundle" ]
+              then
+                  ln -sfn $i /var/felix/$(basename $i)
+              fi
+          done
+
+          # Symlink bundles
+          mkdir -p /var/felix/bundle
+          chown ${cfg.user}:${cfg.group} /var/felix/bundle
+
+          for i in ${pkgs.felix}/bundle/* ${toString cfg.bundles}
+          do
+              if [ -f $i ]
+              then
+                  ln -sfn $i /var/felix/bundle/$(basename $i)
+              elif [ -d $i ]
+              then
+                  for j in $i/bundle/*
+              do
+                  ln -sfn $j /var/felix/bundle/$(basename $j)
+              done
+              fi
+          done
+        fi
+      '';
+
+      script = ''
+        cd /var/felix
+        ${pkgs.su}/bin/su -s ${pkgs.bash}/bin/sh ${cfg.user} -c '${pkgs.jre}/bin/java -jar bin/felix.jar'
+      '';
+    };
+  };
+}