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/mbuffer/default.nix

@@ -0,0 +1,40 @@
+{ lib
+, stdenv
+, fetchurl
+, openssl
+, which
+}:
+
+stdenv.mkDerivation rec {
+  pname = "mbuffer";
+  version = "20211018";
+
+  src = fetchurl {
+    url = "http://www.maier-komor.de/software/mbuffer/mbuffer-${version}.tgz";
+    sha256 = "sha256-4kDB5OSsFMKL6MZg7EfUTOFrHo7JKqkHrRMAT/1dtuM=";
+  };
+
+  buildInputs = [
+    openssl
+    which
+  ];
+
+  # The mbuffer configure scripts fails to recognize the correct
+  # objdump binary during cross-building for foreign platforms.
+  # The correct objdump is exposed via the environment variable
+  # $OBJDUMP, which should be used in such cases.
+  preConfigure = lib.optionalString (stdenv.hostPlatform != stdenv.buildPlatform) ''
+    substituteInPlace configure \
+      --replace "OBJDUMP=$ac_cv_path_OBJDUMP" 'OBJDUMP=''${OBJDUMP}'
+  '';
+
+  doCheck = true;
+
+  meta = with lib; {
+    description  = "A tool for buffering data streams with a large set of unique features";
+    homepage = "https://www.maier-komor.de/mbuffer.html";
+    license = licenses.gpl3Only;
+    maintainers = with maintainers; [ tokudan ];
+    platforms = platforms.linux; # Maybe other non-darwin Unix
+  };
+}