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/tools/package-management/nix/nix-perl.nix

@@ -0,0 +1,41 @@
+{ stdenv
+, perl
+, pkg-config
+, curl
+, nix
+, libsodium
+, boost
+, autoreconfHook
+, autoconf-archive
+, nlohmann_json
+}:
+
+stdenv.mkDerivation {
+  pname = "nix-perl";
+  inherit (nix) version src;
+
+  postUnpack = "sourceRoot=$sourceRoot/perl";
+
+  # This is not cross-compile safe, don't have time to fix right now
+  # but noting for future travellers.
+  nativeBuildInputs = [
+    autoconf-archive
+    autoreconfHook
+    boost
+    curl
+    libsodium
+    nix
+    nlohmann_json
+    perl
+    pkg-config
+  ];
+
+  configureFlags = [
+    "--with-dbi=${perl.pkgs.DBI}/${perl.libPrefix}"
+    "--with-dbd-sqlite=${perl.pkgs.DBDSQLite}/${perl.libPrefix}"
+  ];
+
+  preConfigure = "export NIX_STATE_DIR=$TMPDIR";
+
+  preBuild = "unset NIX_INDENT_MAKE";
+}