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/text/gpt2tc/0001-add-python-shebang.patch

@@ -0,0 +1,10 @@
+diff --git a/gpt2convert.py b/gpt2convert.py
+index 34ca909..6e6cac5 100644
+--- a/gpt2convert.py
++++ b/gpt2convert.py
+@@ -1,3 +1,5 @@
++#!/usr/bin/env python3
++
+ import sys
+ import tensorflow as tf
+ import numpy as np