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/filesystems/gpart/default.nix

@@ -0,0 +1,33 @@
+{ lib, stdenv, fetchFromGitHub, autoreconfHook }:
+
+stdenv.mkDerivation rec {
+  pname = "gpart";
+  version = "0.3";
+
+  # GitHub repository 'collating patches for gpart from all distributions':
+  src = fetchFromGitHub {
+    sha256 = "1lsd9k876p944k9s6sxqk5yh9yr7m42nbw9vlsllin7pd4djl4ya";
+    rev = version;
+    repo = "gpart";
+    owner = "baruch";
+  };
+
+  nativeBuildInputs = [ autoreconfHook ];
+
+  enableParallelBuilding = true;
+
+  doCheck = true;
+
+  meta = with lib; {
+    inherit (src.meta) homepage;
+    description = "Guess PC-type hard disk partitions";
+    longDescription = ''
+      Gpart is a tool which tries to guess the primary partition table of a
+      PC-type hard disk in case the primary partition table in sector 0 is
+      damaged, incorrect or deleted. The guessed table can be written to a file
+      or device.
+    '';
+    license = licenses.gpl2Plus;
+    platforms = platforms.linux;
+  };
+}