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/tools/gnulib/default.nix

@@ -0,0 +1,36 @@
+{ lib, stdenv, fetchgit, python3 }:
+
+stdenv.mkDerivation {
+  pname = "gnulib";
+  version = "20210702";
+
+  src = fetchgit {
+    url = "https://git.savannah.gnu.org/r/gnulib.git";
+    rev = "901694b904cd861adc2529b2e05a3fb33f9b534f";
+    sha256 = "1f5znlv2wjziglw9vlygdgm4jfbsz34h2dz6w4h90bl4hm0ycb1w";
+  };
+
+  postPatch = ''
+    patchShebangs gnulib-tool.py
+  '';
+
+  buildInputs = [ python3 ];
+
+  installPhase = ''
+    mkdir -p $out/bin
+    cp -r * $out/
+    ln -s $out/lib $out/include
+    ln -s $out/gnulib-tool $out/bin/
+  '';
+
+  # do not change headers to not update all vendored build files
+  dontFixup = true;
+
+  meta = with lib; {
+    description = "Central location for code to be shared among GNU packages";
+    homepage = "https://www.gnu.org/software/gnulib/";
+    license = licenses.gpl3Plus;
+    mainProgram = "gnulib-tool";
+    platforms = platforms.unix;
+  };
+}