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/systrayhelper/default.nix

@@ -0,0 +1,38 @@
+{ lib, pkg-config, libappindicator-gtk3, buildGoPackage, fetchFromGitHub }:
+
+buildGoPackage rec {
+  pname = "systrayhelper";
+  version = "0.0.5";
+  rev = "ded1f2ed4d30f6ca2c89a13db0bd3046c6d6d0f9";
+
+  goPackagePath = "github.com/ssbc/systrayhelper";
+
+  src = fetchFromGitHub {
+    rev = "v${version}";
+    owner = "ssbc";
+    repo = "systrayhelper";
+    sha256 = "0bn3nf43m89qmh8ds5vmv0phgdz32idz1zisr47jmvqm2ky1a45s";
+  };
+
+  # re date: https://github.com/NixOS/nixpkgs/pull/45997#issuecomment-418186178
+  # > .. keep the derivation deterministic. Otherwise, we would have to rebuild it every time.
+  ldflags = [
+    "-X main.version=v${version}"
+    "-X main.commit=${rev}"
+    "-X main.date=nix-byrev"
+    "-s"
+    "-w"
+  ];
+
+  nativeBuildInputs = [ pkg-config libappindicator-gtk3 ];
+  buildInputs = [ libappindicator-gtk3 ];
+
+  meta = with lib; {
+    description = "A systray utility written in go, using json over stdio for control and events";
+    homepage    = "https://github.com/ssbc/systrayhelper";
+    maintainers = with maintainers; [ cryptix ];
+    license     = licenses.mit;
+    # It depends on the inputs, i guess? not sure about solaris, for instance. go supports it though
+    # I hope nix can figure this out?! ¯\\_(ツ)_/¯
+  };
+}