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/misc/memo/default.nix

@@ -0,0 +1,52 @@
+{ fetchFromGitHub, silver-searcher, tree, man, lib, stdenv,
+  git,
+  pandocSupport ? true, pandoc ? null
+  , ... }:
+
+assert pandocSupport -> pandoc != null;
+
+stdenv.mkDerivation rec {
+
+  pname = "memo";
+
+  version = "0.8";
+
+  src = fetchFromGitHub {
+    owner  = "mrVanDalo";
+    repo   = "memo";
+    rev    = version;
+    sha256 = "0azx2bx6y7j0637fg3m8zigcw09zfm2mw9wjfg218sx88cm1wdkp";
+  };
+
+  installPhase = let
+    pandocReplacement = if pandocSupport then
+      "pandoc_cmd=${pandoc}/bin/pandoc"
+    else
+      "#pandoc_cmd=pandoc";
+  in ''
+    mkdir -p $out/{bin,share/man/man1,share/bash-completion/completions,share/zsh/site-functions}
+    substituteInPlace memo \
+      --replace "ack_cmd=ack"       "ack_cmd=${silver-searcher}/bin/ag" \
+      --replace "tree_cmd=tree"     "tree_cmd=${tree}/bin/tree" \
+      --replace "man_cmd=man"       "man_cmd=${man}/bin/man" \
+      --replace "git_cmd=git"       "git_cmd=${git}/bin/git" \
+      --replace "pandoc_cmd=pandoc" "${pandocReplacement}"
+    mv memo $out/bin/
+    mv doc/memo.1 $out/share/man/man1/memo.1
+    mv completion/bash/memo.sh $out/share/bash-completion/completions/memo.sh
+    mv completion/zsh/_memo    $out/share/zsh/site-functions/_memo
+  '';
+
+  meta = {
+    description = "A simple tool written in bash to memorize stuff";
+    longDescription = ''
+      A simple tool written in bash to memorize stuff.
+      Memo organizes is structured through topics which are folders in ~/memo.
+    '';
+    homepage = "http://palovandalo.com/memo/";
+    downloadPage = "https://github.com/mrVanDalo/memo/releases";
+    license = lib.licenses.gpl3;
+    maintainers = [ lib.maintainers.mrVanDalo ];
+    platforms = lib.platforms.all;
+  };
+}