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/qubes/qubes-core-vchan-xen/default.nix

@@ -0,0 +1,35 @@
+{ lib, stdenv
+, fetchFromGitHub
+, xen_4_10
+}:
+
+stdenv.mkDerivation rec {
+  pname = "qubes-core-vchan-xen";
+  version = "4.1.4";
+
+  src = fetchFromGitHub {
+    owner = "QubesOS";
+    repo = pname;
+    rev = "v${version}";
+    sha256 = "sha256:02l1vs5c2jfw22gxvl2fb66m0d99n8ya1i7rphsb5cxsljvxary0";
+  };
+
+  buildInputs = [ xen_4_10 ];
+
+  buildPhase = ''
+    make all PREFIX=/ LIBDIR="$out/lib" INCLUDEDIR="$out/include"
+  '';
+
+  installPhase = ''
+    make install DESTDIR=$out PREFIX=/
+  '';
+
+  meta = with lib; {
+    description = "Libraries required for the higher-level Qubes daemons and tools";
+    homepage = "https://qubes-os.org";
+    license = licenses.gpl2Plus;
+    maintainers = with maintainers; [ _0x4A6F ];
+    platforms = platforms.linux;
+  };
+
+}