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/poly2tri-c/default.nix

@@ -0,0 +1,43 @@
+{ lib, stdenv
+, fetchFromGitLab
+, autoreconfHook
+, pkg-config
+, glib
+}:
+
+stdenv.mkDerivation rec {
+  pname = "poly2tri-c";
+  version = "0.1.0";
+
+  outputs = [ "bin" "out" "dev" ];
+
+  src = fetchFromGitLab {
+    domain = "gitlab.gnome.org";
+    owner = "jtojnar";
+    repo = pname;
+    rev = "p2tc-${version}";
+    sha256 = "158vm3wqfxs22b74kqc4prlvjny38qqm3kz5wrgasmx0qciwh0g8";
+  };
+
+  nativeBuildInputs = [
+    autoreconfHook
+    pkg-config
+  ];
+
+  buildInputs = [
+    glib
+  ];
+
+  NIX_CFLAGS_COMPILE = [
+    "--std=gnu99"
+    "-Wno-error"
+  ];
+
+  meta = with lib; {
+    description = "Library for generating, refining and rendering 2-Dimensional Constrained Delaunay Triangulations";
+    homepage = "https://code.google.com/archive/p/poly2tri-c/";
+    license = licenses.bsd3;
+    maintainers = with lib.maintainers; [ jtojnar ];
+    platforms = platforms.unix;
+  };
+}