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/xtensor/default.nix

@@ -0,0 +1,36 @@
+{ lib
+, stdenv
+, fetchFromGitHub
+, cmake
+, gtest
+, xsimd
+, xtl
+}:
+stdenv.mkDerivation rec {
+  pname = "xtensor";
+  version = "0.23.10";
+
+  src = fetchFromGitHub {
+    owner = "xtensor-stack";
+    repo = "xtensor";
+    rev = version;
+    sha256 = "1ayrhyh9x33b87ic01b4jzxc8x27yxpxzya5x54ikazvz8p71n14";
+  };
+
+  nativeBuildInputs = [ cmake ];
+  propagatedBuildInputs = [ xtl xsimd ];
+
+  cmakeFlags = [ "-DBUILD_TESTS=ON" ];
+
+  doCheck = true;
+  checkInputs = [ gtest ];
+  checkTarget = "xtest";
+
+  meta = with lib; {
+    description = "Multi-dimensional arrays with broadcasting and lazy computing.";
+    homepage = "https://github.com/xtensor-stack/xtensor";
+    license = licenses.bsd3;
+    maintainers = with maintainers; [ cpcloud ];
+    platforms = platforms.all;
+  };
+}