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/tools/rust/rust-analyzer/test-neovim-lsp.nix

@@ -0,0 +1,49 @@
+{ runCommand, cargo, neovim, rust-analyzer, rustc }:
+runCommand "test-neovim-rust-analyzer" {
+  nativeBuildInputs = [ cargo neovim rust-analyzer rustc ];
+
+  testRustSrc = /* rust */ ''
+    fn main() {
+      let mut var = vec![None];
+      var.push(Some("hello".to_owned()));
+    }
+  '';
+
+  nvimConfig = /* lua */ ''
+    vim.lsp.buf_attach_client(vim.api.nvim_get_current_buf(), vim.lsp.start_client({
+      cmd = { "rust-analyzer" },
+      handlers = {
+        ["$/progress"] = function(_, msg, ctx)
+          if msg.token == "rustAnalyzer/Indexing" and msg.value.kind == "end" then
+            vim.cmd("goto 23") -- let mut |var =...
+            vim.lsp.buf.hover()
+          end
+        end,
+        ["textDocument/hover"] = function(_, msg, ctx)
+          -- Keep newlines.
+          io.write(msg.contents.value)
+          vim.cmd("q")
+        end,
+      },
+      on_error = function(code)
+        print("error: " .. code)
+        vim.cmd("q")
+      end
+    }))
+  '';
+
+} ''
+  # neovim requires a writable HOME.
+  export HOME="$(pwd)"
+
+  cargo new --bin test-rust-analyzer
+  cd test-rust-analyzer
+  cat <<<"$testRustSrc" >src/main.rs
+  cat <<<"$nvimConfig" >script.lua
+
+  # `-u` doesn't work
+  result="$(nvim --headless +'lua dofile("script.lua")' src/main.rs)"
+  echo "$result"
+  [[ "$result" == *"var: Vec<Option<String>>"* ]]
+  touch $out
+''