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/patchelf/unstable.nix

@@ -0,0 +1,40 @@
+{ lib, stdenv, fetchurl, autoreconfHook, fetchFromGitHub, unstableGitUpdater }:
+
+stdenv.mkDerivation rec {
+  pname = "patchelf";
+  version = "unstable-2022-02-21";
+
+  src = fetchFromGitHub {
+    owner = "NixOS";
+    repo = "patchelf";
+    rev = "a35054504293f9ff64539850d1ed0bfd2f5399f2";
+    sha256 = "sha256-/hD/abmzWSkDhAWPLHiLQQ9cwJF8oFDuovNzRqs3Bho=";
+  };
+
+  # Drop test that fails on musl (?)
+  postPatch = lib.optionalString stdenv.hostPlatform.isMusl ''
+    substituteInPlace tests/Makefile.am \
+      --replace "set-rpath-library.sh" ""
+  '';
+
+  setupHook = [ ./setup-hook.sh ];
+
+  nativeBuildInputs = [ autoreconfHook ];
+  buildInputs = [ ];
+
+  doCheck = !stdenv.isDarwin;
+
+  passthru = {
+    updateScript = unstableGitUpdater {
+      url = "https://github.com/NixOS/patchelf.git";
+    };
+  };
+
+  meta = with lib; {
+    homepage = "https://github.com/NixOS/patchelf";
+    license = licenses.gpl3;
+    description = "A small utility to modify the dynamic linker and RPATH of ELF executables";
+    maintainers = [ maintainers.eelco ];
+    platforms = platforms.all;
+  };
+}