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/system/retry/default.nix

@@ -0,0 +1,30 @@
+{ lib
+, stdenv
+, fetchFromGitHub
+, autoreconfHook
+, txt2man
+, which
+}:
+
+stdenv.mkDerivation rec {
+  pname = "retry";
+  version = "1.0.4";
+
+  src = fetchFromGitHub {
+    owner = "minfrin";
+    repo = "retry";
+    rev = "${pname}-${version}";
+    hash = "sha256-C6PYt5NjDT4w1yuWnw1+Z/L3j1S5zwTGsI44yrMnPUs=";
+  };
+
+  nativeBuildInputs = [ autoreconfHook txt2man which ];
+
+  meta = with lib; {
+    homepage = "https://github.com/minfrin/retry";
+    description = "Retry a command until the command succeeds";
+    license = licenses.asl20;
+    maintainers = with maintainers; [ gfrascadorio ];
+    platforms = platforms.all;
+  };
+}
+