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/applications/emulators/xcpc/default.nix

@@ -0,0 +1,29 @@
+{ lib, stdenv, fetchurl, pkg-config, glib, libXaw, libX11, libXext
+  , libDSKSupport ? true, libdsk
+  , motifSupport ? false, lesstif
+}:
+
+with lib;
+stdenv.mkDerivation rec {
+  version = "20070122";
+  pname = "xcpc";
+
+  src = fetchurl {
+    url = "mirror://sourceforge/xcpc/${pname}-${version}.tar.gz";
+    sha256 = "0hxsbhmyzyyrlidgg0q8izw55q0z40xrynw5a1c3frdnihj9jf7n";
+  };
+
+  nativeBuildInputs = [ pkg-config ];
+
+  buildInputs = [ glib libdsk libXaw libX11 libXext ]
+    ++ optional libDSKSupport libdsk
+    ++ optional motifSupport lesstif;
+
+  meta = {
+    description = "A portable Amstrad CPC 464/664/6128 emulator written in C";
+    homepage = "https://www.xcpc-emulator.net";
+    license = licenses.gpl2Plus;
+    maintainers = [ ];
+    platforms = platforms.linux;
+  };
+}