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/tools/misc/autorevision/default.nix

@@ -0,0 +1,36 @@
+{ lib, stdenv, fetchurl, asciidoc, libxml2, docbook_xml_dtd_45, libxslt
+, docbook_xsl, diffutils, coreutils, gnugrep, gnused
+}:
+
+stdenv.mkDerivation rec {
+  pname = "autorevision";
+  version = "1.22";
+
+  src = fetchurl {
+    url = "https://github.com/Autorevision/autorevision/releases/download/v%2F${version}/autorevision-${version}.tgz";
+    sha256 = "sha256-3ktLVC73m2xddq5BhxVKw/FJd6pZ5RVb7fv29dxUoRE=";
+  };
+
+  buildInputs = [
+    asciidoc libxml2 docbook_xml_dtd_45 libxslt docbook_xsl
+  ];
+
+  installFlags = [ "prefix=$(out)" ];
+
+  postInstall = ''
+    sed -e "s|\<cmp\>|${diffutils}/bin/cmp|g" \
+        -e "s|\<cat\>|${coreutils}/bin/cat|g" \
+        -e "s|\<grep\>|${gnugrep}/bin/grep|g" \
+        -e "s|\<sed\>|${gnused}/bin/sed|g" \
+        -e "s|\<tee\>|${coreutils}/bin/tee|g" \
+        -i "$out/bin/autorevision"
+  '';
+
+  meta = with lib; {
+    description = "Extracts revision metadata from your VCS repository";
+    homepage = "https://autorevision.github.io/";
+    license = licenses.mit;
+    platforms = platforms.all;
+    maintainers = [ maintainers.bjornfor ];
+  };
+}