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/misc/silicon/default.nix

@@ -0,0 +1,47 @@
+{ lib
+, stdenv
+, rustPlatform
+, fetchFromGitHub
+, pkg-config
+, cmake
+, llvmPackages
+, expat
+, freetype
+, libxcb
+, python3
+, libiconv
+, AppKit
+, CoreText
+, Security
+, fira-code
+}:
+
+rustPlatform.buildRustPackage rec {
+  pname = "silicon";
+  version = "0.4.3";
+
+  src = fetchFromGitHub {
+    owner = "Aloxaf";
+    repo = "silicon";
+    rev = "v${version}";
+    sha256 = "sha256-yhs9BEMMFUtptd0cLsaUW02QZVhztvn8cB0nUqPnO+Y=";
+  };
+
+  cargoSha256 = "sha256-tj5HPE9EGC7JQ3dyeMPPI0/3r/idrShqfbpnVuaEtDk=";
+
+  buildInputs = [ llvmPackages.libclang expat freetype fira-code ]
+    ++ lib.optionals stdenv.isLinux [ libxcb ]
+    ++ lib.optionals stdenv.isDarwin [ libiconv AppKit CoreText Security ];
+
+  nativeBuildInputs = [ cmake pkg-config ]
+    ++ lib.optionals stdenv.isLinux [ python3 ];
+
+  LIBCLANG_PATH = "${llvmPackages.libclang.lib}/lib";
+
+  meta = with lib; {
+    description = "Create beautiful image of your source code";
+    homepage = "https://github.com/Aloxaf/silicon";
+    license = with licenses; [ mit /* or */ asl20 ];
+    maintainers = with maintainers; [ evanjs ];
+  };
+}