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/python-modules/chiavdf/dont_fetch_dependencies.patch

@@ -0,0 +1,14 @@
+diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
+index c975128..a9f6910 100644
+--- a/src/CMakeLists.txt
++++ b/src/CMakeLists.txt
+@@ -31,8 +31,7 @@ include(FetchContent)
+ 
+ FetchContent_Declare(
+   pybind11-src
+-  GIT_REPOSITORY https://github.com/pybind/pybind11.git
+-  GIT_TAG        v2.6.2
++  SOURCE_DIR @pybind11_src@
+ )
+ FetchContent_MakeAvailable(pybind11-src)
+