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/editors/flpsed/default.nix

@@ -0,0 +1,27 @@
+{ lib, stdenv, fetchurl, fltk13, ghostscript }:
+
+stdenv.mkDerivation rec {
+  pname = "flpsed";
+  version = "0.7.3";
+
+  src = fetchurl {
+    url = "http://www.flpsed.org/${pname}-${version}.tar.gz";
+    sha256 = "0vngqxanykicabhfdznisv82k5ypkxwg0s93ms9ribvhpm8vf2xp";
+  };
+
+  buildInputs = [ fltk13 ];
+
+  postPatch = ''
+    # replace the execvp call to ghostscript
+    sed -e '/exec_gs/ {n; s|"gs"|"${lib.getBin ghostscript}/bin/gs"|}' \
+        -i src/GsWidget.cxx
+  '';
+
+  meta = with lib; {
+    description = "WYSIWYG PostScript annotator";
+    homepage = "https://flpsed.org/flpsed.html";
+    license = licenses.gpl3;
+    platforms = platforms.linux;
+    maintainers = with maintainers; [ ];
+  };
+}