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/servers/fishnet/Cargo.lock.patch

@@ -0,0 +1,13 @@
+diff --git a/Cargo.lock b/Cargo.lock
+index 963e40e..fb76d78 100644
+--- a/Cargo.lock
++++ b/Cargo.lock
+@@ -230,7 +230,7 @@ dependencies = [
+
+ [[package]]
+ name = "fishnet"
+-version = "2.5.1-dev"
++version = "2.5.1"
+ dependencies = [
+  "arrayvec",
+  "atty",