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/graphics/sane/backends/dsseries/default.nix

@@ -0,0 +1,53 @@
+{ lib, stdenv, fetchurl, rpmextract }:
+
+stdenv.mkDerivation rec {
+  pname = "libsane-dsseries";
+  version = "1.0.5-1";
+
+  src = fetchurl {
+    url = "https://download.brother.com/welcome/dlf100974/${pname}-${version}.x86_64.rpm";
+    sha256 = "1wfdbfbf51cc7njzikdg48kwpnpc0pg5s6p0s0y3z0q7y59x2wbq";
+  };
+
+  nativeBuildInputs = [ rpmextract ];
+
+  unpackCmd = ''
+    mkdir ${pname}-${version} && pushd ${pname}-${version}
+    rpmextract $curSrc
+    popd
+  '';
+
+  patchPhase = ''
+    substituteInPlace etc/udev/rules.d/50-Brother_DSScanner.rules \
+      --replace 'GROUP="users"' 'GROUP="scanner", ENV{libsane_matched}="yes"'
+
+    mkdir -p etc/sane.d/dll.d
+    echo "dsseries" > etc/sane.d/dll.d/dsseries.conf
+  '';
+
+  installPhase = ''
+    mkdir -p $out
+    cp -dr etc $out
+    cp -dr usr/lib64 $out/lib
+  '';
+
+  preFixup = ''
+    for f in `find $out/lib/sane/ -type f`; do
+      # Make it possible to find libstdc++.so.6
+      patchelf --set-rpath ${stdenv.cc.cc.lib}/lib:$out/lib/sane $f
+
+      # Horrible kludge: The driver hardcodes /usr/lib/sane/ as a dlopen path.
+      # We can directly modify the binary to force a relative lookup instead.
+      # The new path is NULL-padded to the same length as the original path.
+      sed -i "s|/usr/lib/sane/%s|%s\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00|g" $f
+    done
+  '';
+
+  meta = {
+    description = "Brother DSSeries SANE backend driver";
+    homepage = "http://www.brother.com";
+    platforms = lib.platforms.linux;
+    license = lib.licenses.unfree;
+    maintainers = with lib.maintainers; [ callahad ];
+  };
+}