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/libraries/cmark-gfm/default.nix

@@ -0,0 +1,30 @@
+{ lib, stdenv, fetchFromGitHub, cmake }:
+stdenv.mkDerivation rec {
+  pname = "cmark-gfm";
+  version = "0.29.0.gfm.3";
+
+  src = fetchFromGitHub {
+    owner = "github";
+    repo = "cmark-gfm";
+    rev = version;
+    sha256 = "sha256-V3XegSjqKLCMpfnoYHr9/r5fSC2CC7A2jXkAcHUt7eA=";
+  };
+
+  nativeBuildInputs = [ cmake ];
+  # tests load the library dynamically which for unknown reason failed
+  doCheck = false;
+
+  # remove when https://github.com/github/cmark-gfm/pull/248 merged and released
+  postInstall = ''
+    substituteInPlace $out/include/cmark-gfm-core-extensions.h \
+    --replace '#include "config.h"' '#include <stdbool.h>'
+  '';
+
+  meta = with lib; {
+    description = "GitHub's fork of cmark, a CommonMark parsing and rendering library and program in C";
+    homepage = "https://github.com/github/cmark-gfm";
+    maintainers = with maintainers; [ cyplo ];
+    platforms = platforms.unix;
+    license = licenses.bsd2;
+  };
+}