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/version-management/git-and-tools/gitflow/default.nix

@@ -0,0 +1,42 @@
+{ pkgs, lib, stdenv, fetchFromGitHub }:
+
+with pkgs.lib;
+
+stdenv.mkDerivation rec {
+  pname = "gitflow";
+  version = "1.12.3";
+
+  src = fetchFromGitHub {
+    owner = "petervanderdoes";
+    repo = pname;
+    rev = version;
+    sha256 = "sha256-kHirHG/bfsU6tKyQ0khNSTyChhzHfzib+HyA3LOtBI8=";
+  };
+
+  nativeBuildInputs = [ pkgs.makeWrapper ];
+
+  preBuild = ''
+    makeFlagsArray+=(prefix="$out")
+  '';
+
+  postInstall = ''
+    wrapProgram $out/bin/git-flow \
+      --set FLAGS_GETOPT_CMD ${pkgs.getopt}/bin/getopt \
+      --suffix PATH : ${pkgs.git}/bin \
+      --prefix PATH : ${pkgs.coreutils}/bin
+  '';
+
+  meta = with lib; {
+    homepage = "https://github.com/petervanderdoes/gitflow";
+    description = "Extend git with the Gitflow branching model";
+    longDescription = ''
+      A set of scripts that provide high-level repository operations
+      for managing feature/release/hotfix branches in a Git repository,
+      particularly suited to be utilised to follow Vincent Driessen's
+      branching model.
+    '';
+    license = licenses.bsd2;
+    platforms = platforms.all;
+    maintainers = with maintainers; [ offline ];
+  };
+}