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/build-support/rust/test/import-cargo-lock/git-dependency/Cargo.toml

@@ -0,0 +1,8 @@
+[package]
+name = "git-dependency"
+version = "0.1.0"
+authors = ["Daniël de Kok <me@danieldk.eu>"]
+edition = "2018"
+
+[dependencies]
+rand = { git = "https://github.com/rust-random/rand.git" }