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>

pkgs/servers/icingaweb2/theme-unicorn/default.nix

@@ -0,0 +1,51 @@
+{ lib
+, stdenv
+, fetchurl
+, fetchFromGitHub
+}:
+
+stdenv.mkDerivation rec {
+  pname = "icingaweb2-theme-unicorn";
+  version = "1.0.2";
+
+  srcs = [
+    (fetchFromGitHub {
+      owner = "Mikesch-mp";
+      repo = pname;
+      rev = "v${version}";
+      sha256 = "1qmcajdf0g70vp2avqa50lfrfigq22k91kggbgn5ablwyg9dki05";
+    })
+    (fetchurl {
+      url = "http://i.imgur.com/SCfMd.png";
+      sha256 = "1y6wqm1z6mn0a6jankd7pzqgi7zm5320kk6knvbv3qhzx2b74ypp";
+    })
+  ];
+
+  unpackPhase = ''
+    for src in $srcs; do
+      case $src in
+        *.png)
+          cp $src unicorn.png
+          ;;
+        *)
+          cp -r $src/* .
+          ;;
+      esac
+    done
+  '';
+
+  installPhase = ''
+    mkdir -p "$out"
+    cp -r * "$out"
+    chmod 755 $out/public/img
+    cp unicorn.png "$out/public/img/unicorn.png"
+  '';
+
+  meta = with lib; {
+    description = "Unicorn theme for IcingaWeb 2";
+    homepage = "https://github.com/Mikesch-mp/icingaweb2-theme-unicorn";
+    license = licenses.publicDomain;
+    platforms = platforms.all;
+    maintainers = with maintainers; [ das_j ];
+  };
+}