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/networking/mtr/default.nix

@@ -0,0 +1,53 @@
+{ stdenv
+, lib
+, fetchFromGitHub
+, fetchpatch
+, autoreconfHook
+, pkg-config
+, libcap
+, ncurses
+, jansson
+, withGtk ? false
+, gtk3
+}:
+
+stdenv.mkDerivation rec {
+  pname = "mtr${lib.optionalString withGtk "-gui"}";
+  version = "0.95";
+
+  src = fetchFromGitHub {
+    owner = "traviscross";
+    repo = "mtr";
+    rev = "v${version}";
+    sha256 = "sha256-f5bL3IdXibIc1xXCuZHwcEV5vhypRE2mLsS3A8HW2QM=";
+  };
+
+  # we need this before autoreconfHook does its thing
+  postPatch = ''
+    echo ${version} > .tarball-version
+  '';
+
+  # and this after autoreconfHook has generated Makefile.in
+  preConfigure = ''
+    substituteInPlace Makefile.in \
+      --replace ' install-exec-hook' ""
+  '';
+
+  configureFlags = lib.optional (!withGtk) "--without-gtk";
+
+  nativeBuildInputs = [ autoreconfHook pkg-config ];
+
+  buildInputs = [ ncurses jansson ]
+    ++ lib.optional withGtk gtk3
+    ++ lib.optional stdenv.isLinux libcap;
+
+  enableParallelBuilding = true;
+
+  meta = with lib; {
+    description = "A network diagnostics tool";
+    homepage = "https://www.bitwizard.nl/mtr/";
+    license = licenses.gpl2;
+    maintainers = with maintainers; [ koral orivej raskin globin ];
+    platforms = platforms.unix;
+  };
+}