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/misc/ttyplot/default.nix

@@ -0,0 +1,31 @@
+{ lib, stdenv, fetchFromGitHub, ncurses }:
+
+stdenv.mkDerivation rec {
+  pname = "ttyplot";
+  version = "1.4";
+
+  src = fetchFromGitHub {
+    owner = "tenox7";
+    repo = "ttyplot";
+    rev = version;
+    sha256 = "19qm0hx9ljdw9qg78lydn3c627xy7xnx3knq5f7caw9lf0cdp7kf";
+  };
+
+  buildInputs = [ ncurses ];
+
+  buildPhase = ''
+   ${stdenv.cc}/bin/cc ./ttyplot.c -lncurses -o ttyplot
+  '';
+
+  installPhase = ''
+    mkdir -p $out/bin
+    cp ttyplot $out/bin/
+  '';
+
+  meta = with lib; {
+    description = "A simple general purpose plotting utility for tty with data input from stdin";
+    homepage = "https://github.com/tenox7/ttyplot";
+    license = licenses.unlicense;
+    maintainers = with maintainers; [ lassulus ];
+  };
+}