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>

nixos/lib/make-iso9660-image.nix

@@ -0,0 +1,65 @@
+{ stdenv, closureInfo, xorriso, syslinux, libossp_uuid
+
+, # The file name of the resulting ISO image.
+  isoName ? "cd.iso"
+
+, # The files and directories to be placed in the ISO file system.
+  # This is a list of attribute sets {source, target} where `source'
+  # is the file system object (regular file or directory) to be
+  # grafted in the file system at path `target'.
+  contents
+
+, # In addition to `contents', the closure of the store paths listed
+  # in `storeContents' are also placed in the Nix store of the CD.
+  # This is a list of attribute sets {object, symlink} where `object'
+  # is a store path whose closure will be copied, and `symlink' is a
+  # symlink to `object' that will be added to the CD.
+  storeContents ? []
+
+, # Whether this should be an El-Torito bootable CD.
+  bootable ? false
+
+, # Whether this should be an efi-bootable El-Torito CD.
+  efiBootable ? false
+
+, # Whether this should be an hybrid CD (bootable from USB as well as CD).
+  usbBootable ? false
+
+, # The path (in the ISO file system) of the boot image.
+  bootImage ? ""
+
+, # The path (in the ISO file system) of the efi boot image.
+  efiBootImage ? ""
+
+, # The path (outside the ISO file system) of the isohybrid-mbr image.
+  isohybridMbrImage ? ""
+
+, # Whether to compress the resulting ISO image with zstd.
+  compressImage ? false, zstd
+
+, # The volume ID.
+  volumeID ? ""
+}:
+
+assert bootable -> bootImage != "";
+assert efiBootable -> efiBootImage != "";
+assert usbBootable -> isohybridMbrImage != "";
+
+stdenv.mkDerivation {
+  name = isoName;
+  builder = ./make-iso9660-image.sh;
+  nativeBuildInputs = [ xorriso syslinux zstd libossp_uuid ];
+
+  inherit isoName bootable bootImage compressImage volumeID efiBootImage efiBootable isohybridMbrImage usbBootable;
+
+  # !!! should use XML.
+  sources = map (x: x.source) contents;
+  targets = map (x: x.target) contents;
+
+  # !!! should use XML.
+  objects = map (x: x.object) storeContents;
+  symlinks = map (x: x.symlink) storeContents;
+
+  # For obtaining the closure of `storeContents'.
+  closureInfo = closureInfo { rootPaths = map (x: x.object) storeContents; };
+}