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/liboil/default.nix

@@ -0,0 +1,33 @@
+{lib, stdenv, fetchurl, pkg-config }:
+
+stdenv.mkDerivation rec {
+  pname = "liboil";
+  version = "0.3.17";
+
+  src = fetchurl {
+    url = "${meta.homepage}/download/liboil-${version}.tar.gz";
+    sha256 = "0sgwic99hxlb1av8cm0albzh8myb7r3lpcwxfm606l0bkc3h4pqh";
+  };
+
+  patches = [ ./x86_64-cpuid.patch ];
+
+  outputs = [ "out" "dev" "devdoc" ];
+  outputBin = "dev"; # oil-bugreport
+
+  nativeBuildInputs = [ pkg-config ];
+
+  # fix "argb_paint_i386.c:53:Incorrect register `%rax' used with `l' suffix"
+  # errors
+  configureFlags = lib.optional stdenv.isDarwin "--build=x86_64";
+
+  # fixes a cast in inline asm: easier than patching
+  buildFlags = lib.optional stdenv.isDarwin "CFLAGS=-fheinous-gnu-extensions";
+
+  meta = with lib; {
+    description = "A library of simple functions that are optimized for various CPUs";
+    homepage    = "https://liboil.freedesktop.org";
+    license     = licenses.bsd2;
+    maintainers = with maintainers; [ lovek323 ];
+    platforms   = platforms.all;
+  };
+}