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/dhall/build-dhall-directory-package.nix

@@ -0,0 +1,29 @@
+{ buildDhallPackage, lib }:
+
+# This is a minor variation on `buildDhallPackage` that splits the `code`
+# argument into `src` and `file` in such a way that you can easily override
+# the `file`
+#
+# This function is used by `dhall-to-nixpkgs` when given a directory
+lib.makePackageOverridable
+  ( { # Arguments passed through to `buildDhallPackage`
+      name
+    , dependencies ? []
+    , source ? false
+
+    , src
+    , # The file to import, relative to the root directory
+      file ? "package.dhall"
+      # Set to `true` to generate documentation for the package
+    , document ? false
+    }:
+
+    buildDhallPackage
+      ( { inherit name dependencies source;
+
+          code = "${src}/${file}";
+
+        }
+      // lib.optionalAttrs document { documentationRoot = "${src}"; }
+      )
+  )