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/text/diffstat/default.nix

@@ -0,0 +1,27 @@
+{ fetchurl, lib, stdenv }:
+
+stdenv.mkDerivation rec {
+  pname = "diffstat";
+  version = "1.64";
+
+  src = fetchurl {
+    urls = [
+      "ftp://ftp.invisible-island.net/diffstat/diffstat-${version}.tgz"
+      "https://invisible-mirror.net/archives/diffstat/diffstat-${version}.tgz"
+    ];
+    sha256 = "sha256-uK7jjZ0uHQWSbmtVgQqdLC3UB/JNaiZzh1Y6RDbj9/w=";
+  };
+
+  meta = with lib; {
+    description = "Read output of diff and display a histogram of the changes";
+    longDescription = ''
+      diffstat reads the output of diff and displays a histogram of the
+      insertions, deletions, and modifications per-file. It is useful for
+      reviewing large, complex patch files.
+    '';
+    homepage = "https://invisible-island.net/diffstat/";
+    license = licenses.mit;
+    platforms = platforms.unix;
+    maintainers = [ maintainers.bjornfor ];
+  };
+}