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/grail/default.nix

@@ -0,0 +1,25 @@
+{ enableX11 ? true,
+  lib, stdenv, fetchurl, pkg-config, xorg, python3, frame }:
+
+stdenv.mkDerivation rec {
+  pname = "grail";
+  version = "3.1.1";
+
+  src = fetchurl {
+    url = "https://launchpad.net/grail/trunk/${version}/+download/${pname}-${version}.tar.bz2";
+    sha256 = "1wwx5ibjdz5pyd0f5cd1n91y67r68dymxpm2lgd829041xjizvay";
+  };
+
+  nativeBuildInputs = [ pkg-config ];
+  buildInputs = [ python3 frame ]
+  ++ lib.optionals enableX11 [xorg.libX11 xorg.libXtst xorg.libXext xorg.libXi xorg.libXfixes];
+
+  configureFlags = lib.optional enableX11 "--with-x11";
+
+  meta = {
+    homepage = "https://launchpad.net/canonical-multitouch/grail";
+    description = "Gesture Recognition And Instantiation Library";
+    license = lib.licenses.gpl2;
+    platforms = lib.platforms.linux;
+  };
+}