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/datefudge/default.nix

@@ -0,0 +1,44 @@
+{ stdenv, lib, fetchgit, fetchpatch, makeWrapper, coreutils }:
+
+stdenv.mkDerivation rec {
+  pname = "datefudge";
+  version = "1.24";
+
+  src = fetchgit {
+    url = "https://salsa.debian.org/debian/${pname}.git";
+    rev = "debian/${version}";
+    sha256 = "1nh433yx4y4djp0bs6aawqbwk7miq7fsbs9wpjlyh2k9dvil2lrm";
+  };
+
+  nativeBuildInputs = [ makeWrapper ];
+
+  buildInputs = [ coreutils ];
+
+  postPatch = ''
+    substituteInPlace Makefile \
+     --replace "/usr" "/" \
+     --replace "-o root -g root" ""
+    substituteInPlace datefudge.sh \
+     --replace "@LIBDIR@" "$out/lib/"
+  '';
+
+  installFlags = [ "DESTDIR=$(out)" ];
+
+  postInstall = ''
+    chmod +x $out/lib/datefudge/datefudge.so
+    wrapProgram $out/bin/datefudge --prefix PATH : ${coreutils}/bin
+  '';
+
+  meta = with lib; {
+    description = "Fake the system date";
+    longDescription = ''
+      datefudge is a small utility that pretends that the system time is
+      different by pre-loading a small library which modifies the time,
+      gettimeofday and clock_gettime system calls.
+    '';
+    homepage = "https://packages.qa.debian.org/d/datefudge.html";
+    license = licenses.gpl2;
+    platforms = platforms.linux;
+    maintainers = with maintainers; [ leenaars ];
+  };
+}