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/applications/office/libreoffice/gen-shell.nix

@@ -0,0 +1,29 @@
+{ pkgs ? (import <nixpkgs> {}), variant }:
+
+with pkgs;
+
+let
+
+  primary-src = callPackage (./. + "/src-${variant}/primary.nix") {};
+
+in
+
+stdenv.mkDerivation {
+  name = "generate-libreoffice-srcs-shell";
+
+  buildCommand = "exit 1";
+
+  downloadList = stdenv.mkDerivation {
+    name = "libreoffice-${primary-src.version}-download-list";
+    inherit (primary-src) src version;
+    builder = ./download-list-builder.sh;
+  };
+
+  buildInputs = [ python3 ];
+
+  shellHook = ''
+    function generate {
+      python3 generate-libreoffice-srcs.py ${variant} > src-${variant}/download.nix
+    }
+  '';
+}