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/text/discount/default.nix

@@ -0,0 +1,40 @@
+{ lib, stdenv, fetchFromGitHub }:
+
+stdenv.mkDerivation rec {
+  version = "2.2.7b";
+  pname = "discount";
+
+  src = fetchFromGitHub {
+    owner = "Orc";
+    repo = pname;
+    rev = "v${version}";
+    sha256 = "sha256-S6OVKYulhvEPRqNXBsvZ7m2W4cbdnrpZKPAo3SfD+9s=";
+  };
+
+  patches = [ ./fix-configure-path.patch ];
+  configureScript = "./configure.sh";
+  configureFlags = [
+    "--shared"
+    "--debian-glitch" # use deterministic mangling
+    "--pkg-config"
+    "--h1-title"
+  ];
+
+  enableParallelBuilding = true;
+  installTargets = [ "install.everything" ];
+
+  doCheck = true;
+
+  postFixup = lib.optionalString stdenv.isDarwin ''
+    install_name_tool -id $out/lib/libmarkdown.dylib $out/lib/libmarkdown.dylib
+  '';
+
+  meta = with lib; {
+    description = "Implementation of Markdown markup language in C";
+    homepage = "http://www.pell.portland.or.us/~orc/Code/discount/";
+    license = licenses.bsd3;
+    maintainers = with maintainers; [ shell ];
+    mainProgram = "markdown";
+    platforms = platforms.unix;
+  };
+}

pkgs/tools/text/discount/fix-configure-path.patch

@@ -0,0 +1,12 @@
+diff -rupN discount-2.1.6-original/configure.inc discount-2.1.6/configure.inc
+--- discount-2.1.6-original/configure.inc	2014-10-10 15:34:24.158325345 +0100
++++ discount-2.1.6/configure.inc	2014-10-10 15:34:33.553325321 +0100
+@@ -32,7 +32,7 @@
+ # this preamble code is executed when this file is sourced and it picks
+ # interesting things off the command line.
+ #
+-ac_default_path="/sbin:/usr/sbin:/bin:/usr/bin:/usr/local/bin:/usr/X11R6/bin"
++ac_default_path=$PATH
+ 
+ ac_standard="--src=DIR		where the source lives (.)
+ --prefix=DIR		where to install the final product (/usr/local)