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/development/interpreters/scheme48/default.nix

@@ -0,0 +1,24 @@
+{ lib, stdenv, fetchurl }:
+
+stdenv.mkDerivation rec {
+  pname = "scheme48";
+  version = "1.9.2";
+
+  src = fetchurl {
+    url = "http://s48.org/${version}/scheme48-${version}.tgz";
+    sha256 = "1x4xfm3lyz2piqcw1h01vbs1iq89zq7wrsfjgh3fxnlm1slj2jcw";
+  };
+
+  # Make more reproducible by removing build user and date.
+  postPatch = ''
+    substituteInPlace build/build-usual-image --replace '"(made by $USER on $date)"' '""'
+  '';
+
+  meta = with lib; {
+    homepage = "http://s48.org/";
+    description = "Scheme 48 interpreter for R5RS";
+    platforms = platforms.unix;
+    license = licenses.bsd3;
+    maintainers = [ maintainers.siraben ];
+  };
+}