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/networking/flannel/default.nix

@@ -0,0 +1,33 @@
+{ lib, buildGoModule, fetchFromGitHub, nixosTests }:
+
+with lib;
+
+buildGoModule rec {
+  pname = "flannel";
+  version = "0.18.0";
+  rev = "v${version}";
+
+  vendorSha256 = null;
+
+  src = fetchFromGitHub {
+    inherit rev;
+    owner = "flannel-io";
+    repo = "flannel";
+    sha256 = "sha256-cxdbXhj79xp5jT5xY3cIzt5XYndPC+TWIrxBjAvbP0g=";
+  };
+
+  ldflags = [ "-X github.com/flannel-io/flannel/version.Version=${rev}" ];
+
+  # TestRouteCache/TestV6RouteCache fail with "Failed to create newns: operation not permitted"
+  doCheck = false;
+
+  passthru.tests = { inherit (nixosTests) flannel; };
+
+  meta = {
+    description = "Network fabric for containers, designed for Kubernetes";
+    license = licenses.asl20;
+    homepage = "https://github.com/flannel-io/flannel";
+    maintainers = with maintainers; [ johanot offline ];
+    platforms = with platforms; linux;
+  };
+}