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/lightstep-tracer-cpp/default.nix

@@ -0,0 +1,36 @@
+{ stdenv, lib, fetchFromGitHub, pkg-config, cmake
+, opentracing-cpp, protobuf
+, enableGrpc ? false, grpc, openssl
+}:
+
+stdenv.mkDerivation rec {
+  pname = "lightstep-tracer-cpp";
+  version = "0.14.0";
+
+  src = fetchFromGitHub {
+    owner = "lightstep";
+    repo = pname;
+    rev = "v${version}";
+    sha256 = "1xr11dm94qpbx3nxb7si7zy7hzg2akj01pyxkd8pzzbvmkmic16j";
+  };
+
+  nativeBuildInputs = [
+    cmake pkg-config
+  ];
+
+  buildInputs = [
+    opentracing-cpp protobuf
+  ] ++ lib.optionals enableGrpc [
+    grpc openssl
+  ];
+
+  cmakeFlags = lib.optionals (!enableGrpc) [ "-DWITH_GRPC=OFF" ];
+
+  meta = with lib; {
+    description = "Distributed tracing system built on top of the OpenTracing standard";
+    homepage = "https://lightstep.com/";
+    license = licenses.mit;
+    platforms = platforms.linux;
+    maintainers = with maintainers; [ cstrahan ];
+  };
+}