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/pixman/default.nix

@@ -0,0 +1,30 @@
+{ lib, stdenv, fetchurl, pkg-config, libpng, glib /*just passthru*/ }:
+
+stdenv.mkDerivation rec {
+  pname = "pixman";
+  version = "0.38.4";
+
+  src = fetchurl {
+    url = "mirror://xorg/individual/lib/${pname}-${version}.tar.bz2";
+    sha256 = "0l0m48lnmdlmnaxn2021qi5cj366d9fzfjxkqgcj9bs14pxbgaw4";
+  };
+
+  separateDebugInfo = !stdenv.hostPlatform.isStatic;
+
+  nativeBuildInputs = [ pkg-config ];
+
+  buildInputs = [ libpng ];
+
+  configureFlags = lib.optional stdenv.isAarch32 "--disable-arm-iwmmxt";
+
+  doCheck = true;
+
+  postInstall = glib.flattenInclude;
+
+  meta = with lib; {
+    homepage = "http://pixman.org";
+    description = "A low-level library for pixel manipulation";
+    license = licenses.mit;
+    platforms = platforms.all;
+  };
+}