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/shells/rush/default.nix

@@ -0,0 +1,50 @@
+{ fetchurl, lib, stdenv, bash, perl }:
+
+stdenv.mkDerivation rec {
+  pname = "rush";
+  version = "2.2";
+
+  src = fetchurl {
+    url = "mirror://gnu/${pname}/${pname}-${version}.tar.gz";
+    sha256 = "sha256-ld5TdpF7siprQCbhE4oxYhH40x3QZ5NCQlD3zRaNmM0=";
+  };
+
+  strictDeps = true;
+  buildInputs = [ bash ];
+
+  postInstall = ''
+    substituteInPlace $out/bin/rush-po \
+      --replace "exec perl" "exec ${lib.getExe perl}"
+  '';
+
+  doCheck = true;
+
+  meta = {
+    broken = stdenv.isDarwin;
+    description = "Restricted User Shell";
+
+    longDescription =
+      '' GNU Rush is a Restricted User Shell, designed for sites
+         providing limited remote access to their resources, such as
+         svn or git repositories, scp, or the like.  Using a
+         sophisticated configuration file, Rush gives you complete
+         control over the command lines that users execute, as well as
+         over the usage of system resources, such as virtual memory,
+         CPU time, etc.
+
+         In particular, it allows remote programs to be run in a chrooted
+         environment, which is important with such programs as
+         sftp-server or scp, that lack this ability.
+      '';
+
+    homepage = "https://www.gnu.org/software/rush/";
+    license = lib.licenses.gpl3Plus;
+
+    maintainers = [ lib.maintainers.bjg ];
+    platforms = lib.platforms.all;
+  };
+
+  passthru = {
+    shellPath = "/bin/rush";
+  };
+}