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/tools/misc/libbitcoin/libbitcoin-network.nix

@@ -0,0 +1,38 @@
+{ lib, stdenv, fetchFromGitHub, pkg-config, autoreconfHook
+, boost, libbitcoin, zeromq }:
+
+let
+  pname = "libbitcoin-network";
+  version = "3.5.0";
+
+in stdenv.mkDerivation {
+  name = "${pname}-${version}";
+
+  src = fetchFromGitHub {
+    owner = "libbitcoin";
+    repo = pname;
+    rev = "v${version}";
+    sha256 = "0vqg3i40kwmbys4lyp82xvg2nx3ik4qhc66gcm8k66a86wpj9ji6";
+  };
+
+  nativeBuildInputs = [ autoreconfHook pkg-config ];
+  buildInputs = [ libbitcoin zeromq ];
+
+  enableParallelBuilding = true;
+
+  configureFlags = [
+    "--with-tests=no"
+    "--with-boost=${boost.dev}"
+    "--with-boost-libdir=${boost.out}/lib"
+  ];
+
+  meta = with lib; {
+    description = "Bitcoin P2P Network Library";
+    homepage = "https://libbitcoin.info/";
+    platforms = platforms.linux ++ platforms.darwin;
+    maintainers = with maintainers; [ asymmetric ];
+
+    # AGPL with a lesser clause
+    license = licenses.agpl3;
+  };
+}