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/libsigcxx/default.nix

@@ -0,0 +1,31 @@
+{ lib, stdenv, fetchurl, pkg-config, meson, ninja, gnome }:
+
+stdenv.mkDerivation rec {
+  pname = "libsigc++";
+  version = "2.10.8";
+
+  src = fetchurl {
+    url = "mirror://gnome/sources/${pname}/${lib.versions.majorMinor version}/${pname}-${version}.tar.xz";
+    sha256 = "sha256-I1pAvsc0bHuCtqjKrgRWNT3AbnHxS8QUvMhYrxg4cZo=";
+  };
+
+  nativeBuildInputs = [ pkg-config meson ninja ];
+
+  doCheck = true;
+
+  passthru = {
+    updateScript = gnome.updateScript {
+      packageName = pname;
+      attrPath = "libsigcxx";
+      versionPolicy = "odd-unstable";
+      freeze = true;
+    };
+  };
+
+  meta = with lib; {
+    homepage = "https://libsigcplusplus.github.io/libsigcplusplus/";
+    description = "A typesafe callback system for standard C++";
+    license = licenses.lgpl21Plus;
+    platforms = platforms.all;
+  };
+}