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/ddrescue/default.nix

@@ -0,0 +1,52 @@
+{ lib, stdenv
+, fetchurl, lzip
+}:
+
+stdenv.mkDerivation rec {
+  pname = "ddrescue";
+  version = "1.26";
+
+  src = fetchurl {
+    url = "mirror://gnu/ddrescue/ddrescue-${version}.tar.lz";
+    sha256 = "sha256-5RPNOpDZgQ392RGX1AqkD23wFZe/tez9+yBd4RJ8VR8=";
+  };
+
+  nativeBuildInputs = [ lzip ];
+
+  doCheck = true; # not cross;
+  configureFlags = [ "CXX=${stdenv.cc.targetPrefix}c++" ];
+
+  meta = with lib; {
+    description = "GNU ddrescue, a data recovery tool";
+
+    longDescription =
+      '' GNU ddrescue is a data recovery tool.  It copies data from one file
+         or block device (hard disc, cdrom, etc) to another, trying hard to
+         rescue data in case of read errors.
+
+         The basic operation of ddrescue is fully automatic.  That is, you
+         don't have to wait for an error, stop the program, read the log, run
+         it in reverse mode, etc.
+
+         If you use the logfile feature of ddrescue, the data is rescued very
+         efficiently (only the needed blocks are read).  Also you can
+         interrupt the rescue at any time and resume it later at the same
+         point.
+
+         Automatic merging of backups: If you have two or more damaged copies
+         of a file, cdrom, etc, and run ddrescue on all of them, one at a
+         time, with the same output file, you will probably obtain a complete
+         and error-free file.  This is so because the probability of having
+         damaged areas at the same places on different input files is very
+         low.  Using the logfile, only the needed blocks are read from the
+         second and successive copies.
+      '';
+
+    homepage = "https://www.gnu.org/software/ddrescue/ddrescue.html";
+
+    license = licenses.gpl3Plus;
+
+    platforms = platforms.all;
+    maintainers = with maintainers; [ domenkozar fpletz ];
+  };
+}