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/security/rucredstash/default.nix

@@ -0,0 +1,30 @@
+{ lib, rustPlatform, fetchFromGitHub, pkg-config, openssl, stdenv, Security }:
+
+rustPlatform.buildRustPackage rec {
+  pname = "rucredstash";
+  version = "0.9.0";
+
+  src = fetchFromGitHub {
+    owner = "psibi";
+    repo = "rucredstash";
+    rev = "v${version}";
+    sha256 = "1jwsj2y890nxpgmlfbr9hms2raspp5h89ykzsh014mf7lb3yxzwg";
+  };
+
+  nativeBuildInputs = [ pkg-config ];
+  buildInputs = [ openssl ]
+    ++ lib.optional stdenv.isDarwin Security;
+
+  # Disable tests since it requires network access and relies on the
+  # presence of certain AWS infrastructure
+  doCheck = false;
+
+  cargoSha256 = "0qnfrwpdvjksc97iiwn1r6fyqaqn0q3ckbdzswf9flvwshqzb6ih";
+
+  meta = with lib; {
+    description = "Rust port for credstash. Manages credentials securely in AWS cloud";
+    homepage = "https://github.com/psibi/rucredstash";
+    license = licenses.mit;
+    maintainers = with maintainers; [ psibi ];
+  };
+}