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/dclxvi/default.nix

@@ -0,0 +1,36 @@
+{ lib, stdenv, fetchFromGitHub }:
+
+stdenv.mkDerivation {
+  pname = "dclxvi";
+  version = "unstable-2013-01-27";
+
+  src = fetchFromGitHub {
+    owner = "agl";
+    repo = "dclxvi";
+    rev = "74009d58f2305be3b95d88717619bde8ecbdd9a2";
+    sha256 = "1kx4h8iv7yb30c6zjmj8zs9x12vxhi0jwkiwxsxj9swf6bww6p1g";
+  };
+
+  buildFlags = [ "libdclxvipairing.so" ];
+
+  patchPhase = ''
+    substituteInPlace Makefile \
+      --replace "gcc" "cc"
+  '' + lib.optionalString stdenv.isDarwin ''
+    substituteInPlace Makefile \
+      --replace "-soname=libdclxvipairing.so" "-install_name,libdclxvipairing.so"
+  '';
+
+  installPhase = ''
+    mkdir -p $out/{include,lib}
+    find . -name \*.h -exec cp {} $out/include \;
+    find . -name \*.so -exec cp {} $out/lib \;
+  '';
+
+  meta = with lib; {
+    homepage = "https://github.com/agl/dclxvi";
+    description = "Naehrig, Niederhagen and Schwabe's pairings code, massaged into a shared library";
+    platforms = platforms.x86_64;
+    license = licenses.publicDomain;
+  };
+}