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/tools/irony-server/default.nix

@@ -0,0 +1,21 @@
+{ lib, stdenv, cmake, llvmPackages, llvm, irony }:
+
+stdenv.mkDerivation {
+  pname = "irony-server";
+  inherit (irony) src version;
+
+  nativeBuildInputs = [ cmake llvm ];
+  buildInputs = [ llvmPackages.libclang ];
+
+  dontUseCmakeBuildDir = true;
+
+  cmakeDir = "server";
+
+  meta = with lib; {
+    description = "The server part of irony";
+    homepage = "https://melpa.org/#/irony";
+    maintainers = [ maintainers.deepfire ];
+    platforms = platforms.unix;
+    license = licenses.free;
+  };
+}