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/tools/misc/cppi/default.nix

@@ -0,0 +1,32 @@
+{ fetchurl, lib, stdenv }:
+
+stdenv.mkDerivation rec {
+  pname = "cppi";
+  version = "1.18";
+
+  src = fetchurl {
+    url = "mirror://gnu/${pname}/${pname}-${version}.tar.xz";
+    sha256 = "1jk42cjaggk71rimjnx3qpmb6hivps0917vl3z7wbxk3i2whb98j";
+  };
+
+  doCheck = true;
+
+  meta = {
+    homepage = "https://savannah.gnu.org/projects/cppi/";
+
+    description = "A C preprocessor directive indenter";
+
+    longDescription =
+      '' GNU cppi indents C preprocessor directives to reflect their nesting
+         and ensure that there is exactly one space character between each #if,
+         #elif, #define directive and the following token.  The number of
+         spaces between the `#' and the following directive must correspond
+         to the level of nesting of that directive.
+      '';
+
+    license = lib.licenses.gpl3Plus;
+
+    maintainers = [ ];
+    platforms = lib.platforms.all;
+  };
+}