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/misc/xxdiff/default.nix

@@ -0,0 +1,51 @@
+{ lib, mkDerivation, fetchFromBitbucket, docutils, bison, flex, qmake
+, qtbase
+}:
+
+mkDerivation rec {
+  pname = "xxdiff";
+  version = "5.0b1";
+
+  src = fetchFromBitbucket {
+    owner = "blais";
+    repo = pname;
+    rev = "5e5f885dfc43559549a81c59e9e8c9525306356a";
+    sha256 = "0gbvxrkwkbvag3298j89smszghpr8ilxxfb0cvsknfqdf15b296w";
+  };
+
+  nativeBuildInputs = [ bison docutils flex qmake ];
+
+  buildInputs = [ qtbase ];
+
+  dontUseQmakeConfigure = true;
+
+  # c++11 and above is needed for building with Qt 5.9+
+  NIX_CFLAGS_COMPILE = [ "-std=c++14" ];
+
+  sourceRoot = "source/src";
+
+  postPatch = ''
+    substituteInPlace xxdiff.pro --replace ../bin ./bin
+  '';
+
+  preConfigure = ''
+    make -f Makefile.bootstrap
+  '';
+
+  installPhase = ''
+    runHook preInstall
+
+    install -Dm555 -t $out/bin                ./bin/xxdiff
+    install -Dm444 -t $out/share/doc/${pname} ${src}/README
+
+    runHook postInstall
+  '';
+
+  meta = with lib; {
+    description = "Graphical file and directories comparator and merge tool";
+    homepage = "http://furius.ca/xxdiff/";
+    license = licenses.gpl2;
+    maintainers = with maintainers; [ pSub raskin ];
+    platforms = platforms.linux;
+  };
+}