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/build-support/icon-conv-tools/default.nix

@@ -0,0 +1,32 @@
+{ lib, stdenv, icoutils }:
+
+stdenv.mkDerivation {
+  pname = "icon-conv-tools";
+  version = "0.0.0";
+
+  src = ./bin;
+
+  buildInputs = [ icoutils ];
+
+  patchPhase = ''
+    substituteInPlace extractWinRscIconsToStdFreeDesktopDir.sh \
+      --replace "icotool" "${icoutils}/bin/icotool" \
+      --replace "wrestool" "${icoutils}/bin/wrestool"
+  '';
+
+  buildPhase = ''
+    mkdir -p "$out/bin"
+    cp -p * "$out/bin"
+  '';
+
+  installPhase = "true";
+
+  dontPatchELF = true;
+  dontStrip = true;
+
+  meta = with lib; {
+    description = "Tools for icon conversion specific to nix package manager";
+    maintainers = with maintainers; [ jraygauthier ];
+    platforms = platforms.linux;
+  };
+}