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/jsonwatch/default.nix

@@ -0,0 +1,38 @@
+{ lib
+, stdenv
+, fetchFromGitHub
+, rustPlatform
+, Security
+}:
+
+rustPlatform.buildRustPackage rec {
+  pname = "jsonwatch";
+  version = "0.6.0";
+
+  src = fetchFromGitHub {
+    owner = "dbohdan";
+    repo = pname;
+    rev = "v${version}";
+    sha256 = "sha256-TGW04P8t0mAXza7I7qp6QRXA/MDE3m1dlRC7bMf2dSk=";
+  };
+
+  cargoSha256 = "sha256-Gjb7v3kz11iOml3Ykxhy43KNxzaprgMbb5DpPNChLTc=";
+
+  buildInputs = lib.optional stdenv.isDarwin [
+    Security
+  ];
+
+  meta = with lib; {
+    description = "Like watch -d but for JSON";
+    longDescription = ''
+      jsonwatch is a command line utility with which you can track
+      changes in JSON data delivered by a shell command or a web
+      (HTTP/HTTPS) API. jsonwatch requests data from the designated
+      source repeatedly at a set interval and displays the
+      differences when the data changes.
+    '';
+    homepage = "https://github.com/dbohdan/jsonwatch";
+    license = licenses.mit;
+    maintainers = with maintainers; [ fab ];
+  };
+}