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/development/libraries/udunits/default.nix

@@ -0,0 +1,50 @@
+{ lib
+, stdenv
+, fetchFromGitHub
+, autoreconfHook
+, bison
+, expat
+, file
+, flex
+, texinfo
+}:
+
+stdenv.mkDerivation rec {
+  pname = "udunits";
+  version = "unstable-2021-03-17";
+
+  src = fetchFromGitHub {
+    owner = "Unidata";
+    repo = "UDUNITS-2";
+    rev = "c83da987387db1174cd2266b73dd5dd556f4476b";
+    hash = "sha256-+HW21+r65OroCxMK2/B5fe7zHs4hD4xyoJK2bhdJGyQ=";
+  };
+
+  nativeBuildInputs = [
+    autoreconfHook
+    texinfo
+    bison
+    flex
+    file
+  ];
+  buildInputs = [
+    expat
+  ];
+
+  meta = with lib; {
+    homepage = "https://www.unidata.ucar.edu/software/udunits/";
+    description = "A C-based package for the programatic handling of units of physical quantities";
+    longDescription = ''
+      The UDUNITS package supports units of physical quantities. Its C library
+      provides for arithmetic manipulation of units and for conversion of
+      numeric values between compatible units. The package contains an extensive
+      unit database, which is in XML format and user-extendable. The package
+      also contains a command-line utility for investigating units and
+      converting values.
+    '';
+    license = licenses.asl20;
+    maintainers = with maintainers; [ AndersonTorres pSub ];
+    platforms = platforms.all;
+    mainProgram = "udunits2";
+  };
+}