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/libraries/nanopb/test-message-with-annotations/withannotations.proto

@@ -0,0 +1,7 @@
+syntax = "proto3";
+
+import "nanopb.proto";
+
+message WithAnnotations {
+  bytes uuid = 1 [(nanopb).max_size = 16, (nanopb).fixed_length = true];
+}